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109-557: Siloam Cemetery is the oldest cemetery in the city of Vineland in Cumberland County, New Jersey , United States. It was listed on the National Register of Historic Places on April 3, 2020, for its significance in architecture and landscape architecture. The cemetery, located at 550 North Valley Avenue, was established in 1864 on a plot of land donated by Charles K. Landis , the founder of Vineland. A chapel

218-422: A mass grave until they had decomposed . The bones were then exhumed and stored in ossuaries , either along the arcaded bounding walls of the cemetery or within the church under floor slabs and behind walls. In most cultures those who were vastly rich, had important professions , were part of the nobility or were of any other high social status were usually buried in individual crypts inside or beneath

327-524: A sarcophagus ), a mausoleum , a columbarium , a niche, or another edifice. In Western cultures , funeral ceremonies are often observed in cemeteries. These ceremonies or rites of passage differ according to cultural practices and religious beliefs. Modern cemeteries often include crematoria, and some grounds previously used for both continue as crematoria as a principal use long after the interment areas have been filled. The Taforalt cave in Morocco

436-549: A skeleton varies greatly. Even when a body is decomposed, embalming treatment can still be achieved (the arterial system decays more slowly) but would not restore a natural appearance without extensive reconstruction and cosmetic work, and is largely used to control the foul odors due to decomposition. An animal can be preserved almost perfectly, for millions of years in a resin such as amber . There are some examples where bodies have been inexplicably preserved (with no human intervention) for decades or centuries and appear almost

545-479: A Grave , Canadian Headstones , Interment.net , and the World Wide Cemetery . In Western countries, and many others, visitors to graves commonly leave cut flowers , especially during major holidays and on birthdays or relevant anniversaries. Cemeteries usually dispose of these flowers after a few weeks in order to keep the space maintained. Some companies offer perpetual flower services, to ensure

654-621: A backlash which led to the development of the lawn cemetery. In a review of British burial and death practises, Julie Rugg wrote that there were "four closely interlinked factors that explain the 'invention' and widespread adoption of the lawn cemetery: the deterioration of the Victorian cemetery; a self-conscious rejection of Victorian aesthetics in favour of modern alternatives; resource difficulties that, particularly after World War II, increasingly constrained what might be achieved in terms of cemetery maintenance; and growing professionalism in

763-756: A beloved pet on the family property. All of the Saudis in Al Baha are Muslims, and this is reflected in their cemetery and funeral customs. "The southern tribal hinterland of Baha – home to especially the Al- Ghamdi and Al- Zahrani tribes – has been renowned for centuries for their tribal cemeteries that are now slowly vanishing", according to the Asharq Al-Awsat newspaper: "One old villager explained how tribal cemeteries came about. 'People used to die in large numbers and very rapidly one after

872-437: A cemetery as Hybrid, Natural, or Conservation Burial Grounds. Many scientists have argued that natural burials would be a highly efficient use of land if designed specifically to save endangered habitats, ecosystems and species. The opposite has also been proposed. Instead of letting natural burials permanently protect wild landscapes, others have argued that the rapid decomposition of a natural burial, in principle, allows for

981-400: A desire to be environmentally conscious with the body rapidly decomposing and becoming part of the natural environment without incurring the environmental cost of traditional burials. Certifications may be granted for various levels of green burial. Green burial certifications are issued in a tiered system reflecting level of natural burial practice. Green burial certification standards designate

1090-422: A fence which may be made of concrete , cast iron or timber . Where a number of family members are buried together (either vertically or horizontally), the slab or boundaries may encompass a number of graves. Monumental cemeteries are often regarded as unsightly due to the random collection of monuments and headstones they contain. Also, as maintenance of the headstones is the responsibility of family members (in

1199-480: A flower or small posy to be placed on the plaque itself or clips are glued onto the plaque for that purpose. Newer designs of columbarium walls take this desire to leave flowers into account by incorporating a metal clip or loop beside each plaque, typically designed to hold a single flower stem or a small posy. As the flowers decay, they simply fall to the ground and do not create a significant maintenance problem. While uncommon today, family (or private) cemeteries were

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1308-417: A grave is always decorated with fresh flowers. Flowers may often be planted on the grave as well, usually immediately in front of the gravestone. For this purpose roses are highly common. Decomposition One can differentiate abiotic decomposition from biotic decomposition ( biodegradation ). The former means "the degradation of a substance by chemical or physical processes", e.g., hydrolysis ;

1417-482: A grid to replace the chaotic appearance of the churchyard. Urban cemeteries developed over time into a more landscaped form as part of civic development of beliefs and institutions that sought to portray the city as civilized and harmonious. Urban cemeteries were more sanitary (a place to safely dispose of decomposing corpses) than they were aesthetically pleasing. Corpses were usually buried wrapped in cloth, since coffins, burial vaults, and above-ground crypts inhibited

1526-431: A headstone at all usually had some religious symbol made from wood on the place of burial such as a Christian cross ; however, this would quickly deteriorate under the rain or snow. Some families hired a blacksmith and had large crosses made from various metals put on the places of burial. Starting in the early 19th century, the burial of the dead in graveyards began to be discontinued, due to rapid population growth in

1635-457: A higher proportion of recalcitrant material. Consequently, dead animals decompose more rapidly than dead leaves, which themselves decompose more rapidly than fallen branches. As organic material in the soil ages, its quality decreases. The more labile compounds decompose quickly, leaving an increasing proportion of recalcitrant material called humus . Microbial cell walls also contain recalcitrant materials like chitin , and these also accumulate as

1744-537: A hilly area in Nagoya, Japan, effectively creating stone walls blanketing hillsides. The Cross Bones is a burial ground for prostitutes in London. The Neptune Memorial Reef is an underwater columbarium near Key Biscayne . In the 2000s and 2010s, it has become increasingly common for cemeteries and funeral homes to offer online services. There are also stand-alone online "cemeteries" such as DiscoverEverAfter Find

1853-468: A larger surface area that can hold water. The higher the water content of a soil, the lower the oxygen content and consequently, the lower the rate of decomposition. Clay minerals also bind particles of organic material to their surface, making them less accessible to microbes. Soil disturbance like tilling increases decomposition by increasing the amount of oxygen in the soil and by exposing new organic matter to soil microbes. The quality and quantity of

1962-476: A later time. Aquatic and marine environments have break-down agents that include bacteria, fish, crustaceans, fly larvae and other carrion scavengers. Five general stages are typically used to describe the process of decomposition in vertebrate animals: fresh, bloat, active decay, advanced decay, and dry/remains. The general stages of decomposition are coupled with two stages of chemical decomposition: autolysis and putrefaction . These two stages contribute to

2071-403: A major role in breaking down matter, both directly and indirectly via a multitrophic cascading effect Following this, the plant detritus (consisting of cellulose , hemicellulose , microbial metabolites , and lignin ) undergoes chemical alteration by microbes. Different types of compounds decompose at different rates. This is dependent on their chemical structure . For instance, lignin

2180-438: A matter of practicality during the settlement of America. If a municipal or religious cemetery had not been established, settlers would seek out a small plot of land, often in wooded areas bordering their fields, to begin a family plot. Sometimes, several families would arrange to bury their dead together. While some of these sites later grew into true cemeteries, many were forgotten after a family moved away or died out. Today, it

2289-404: A niche in a columbarium wall is a much cheaper alternative to a burial plot. A small plaque (about 15 cm x 10 cm) can be affixed across the front of each niche and is generally included as part of the price of a niche. As the writing on the plaques has to be fairly small to fit on the small size of the plaque, the design of columbarium walls is constrained by the ability of visitors to read

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2398-433: A place where the body is buried in organic material and oxygen cannot reach it. This process of putrefaction has a bad odor accompanied by it due to the hydrogen sulfide and organic matter containing sulfur. Embalming is the practice of delaying the decomposition of human and animal remains. Embalming slows decomposition somewhat but does not forestall it indefinitely. Embalmers typically pay great attention to parts of

2507-422: A sealant) and toxic metals such as copper, lead, and zinc (from coffin handles and flanges). Urban cemeteries relied heavily on the fact that the soft parts of the body would decompose in about 25 years (although, in moist soil, decomposition can take up to 70 years). If room for new burials was needed, older bones could be dug up and interred elsewhere (such as in an ossuary) to make space for new interments. It

2616-444: A separate Act of Parliament for authorisation, although the capital was raised through the formation of joint-stock companies . In the first 50 years of the 19th century the population of London more than doubled from 1 million to 2.3 million. The small parish churchyards were rapidly becoming dangerously overcrowded, and decaying matter infiltrating the water supply was causing epidemics . The issue became particularly acute after

2725-536: A slower rate) even after soils become too dry to support plant growth. When the rains return and soils become wet, the osmotic gradient between the bacterial cells and the soil water causes the cells to gain water quickly. Under these conditions, many bacterial cells burst, releasing a pulse of nutrients. Decomposition rates also tend to be slower in acidic soils. Soils which are rich in clay minerals tend to have lower decomposition rates, and thus, higher levels of organic matter. The smaller particles of clay result in

2834-532: A term still used to describe them today. The concept quickly spread across Europe. Garden/rural cemeteries were not necessarily outside city limits. When land within a city could be found, the cemetery was enclosed with a wall to give it a garden-like quality. These cemeteries were often not sectarian, nor co-located with a house of worship. Inspired by the English landscape garden movement, they often looked like attractive parks. The first garden/rural cemetery in

2943-472: Is a component of wood, which is relatively resistant to decomposition and can in fact only be decomposed by certain fungi , such as the white-rot fungi. Wood decomposition is a complex process involving fungi which transport nutrients to the nutritionally scarce wood from outside environment. Because of this nutritional enrichment, the fauna of saproxylic insects may develop and, in turn, affect dead wood, contributing to decomposition and nutrient cycling in

3052-422: Is a positive sign, but it may take several years for the ecosystem to fully recover and return to its pre-disturbance state. All that remains of the cadaver at this stage is dry skin, cartilage , and bones , which will become dry and bleached if exposed to the elements. If all soft tissue is removed from the cadaver, it is referred to as completely skeletonized , but if only portions of the bones are exposed, it

3161-530: Is an example of this practice. Burial of a body at a site may protect the location from redevelopment, with such estates often being placed in the care of a trust or foundation . In the United States, state regulations have made it increasingly difficult, if not impossible, to start private cemeteries; many require a plan to care for the site in perpetuity. Private cemeteries are nearly always forbidden on incorporated residential zones. Many people will bury

3270-405: Is an important field of study within food science . Food decomposition can be slowed down by conservation . The spoilage of meat occurs, if the meat is untreated, in a matter of hours or days and results in the meat becoming unappetizing, poisonous or infectious. Spoilage is caused by the practically unavoidable infection and subsequent decomposition of meat by bacteria and fungi, which are borne by

3379-435: Is characterized by a decrease in the intensity of the disturbance and an increase in the amount of plant growth around the affected area. This is a sign that the nutrients and other ecological resources present in the surrounding soil have not yet returned to their normal levels. During this stage, it is important to monitor the ecosystem for any signs of continued disturbance or ecological stress. The resurgence of plant growth

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3488-418: Is not uncommon for bodies to remain preserved to a viewable extent after decades. Notable viewable embalmed bodies include those of: A body buried in a sufficiently dry environment may be well preserved for decades. This was observed in the case for murdered civil rights activist Medgar Evers , who was found to be almost perfectly preserved over 30 years after his death, permitting an accurate autopsy when

3597-429: Is not unheard of to discover groupings of tombstones, ranging from a few to a dozen or more, on undeveloped land. As late 20th-century suburban sprawl pressured the pace of development in formerly rural areas, it became increasingly common for larger exurban properties to be encumbered by "religious easements", which are legal requirements for the property owner to permit periodic maintenance of small burial plots located on

3706-478: Is physical breakup or fragmentation of the plant material into smaller pieces, providing greater surface area for colonization and attack by decomposers . In fallen dead parts of plants ( plant litter ), this process is largely carried out by saprophagous ( detritivorous ) soil invertebrate fauna, whereas in standing parts of plants, primarily parasitic life-forms such as parasitic plants (e.g. mistletoes ), insects (e.g. aphids ) and fungi (e.g. polypores ) play

3815-438: Is possibly the oldest known cemetery in the world. It was the resting place of at least 34 Iberomaurusian individuals, the bulk of whom have been dated to 15,100 to 14,000 years ago. [1] Neolithic cemeteries are sometimes referred to by the term " grave field ". They are one of the chief sources of information on ancient and prehistoric cultures, and numerous archaeological cultures are defined by their burial customs, such as

3924-653: Is referred to as partially skeletonized. A dead body that has been exposed to the open elements, such as water and air, will decompose more quickly and attract much more insect activity than a body that is buried or confined in special protective gear or artifacts. This is due, in part, to the limited number of insects that can penetrate soil and the lower temperatures under the soil. The rate and manner of decomposition in an animal body are strongly affected by several factors. In roughly descending degrees of importance, they are: The speed at which decomposition occurs varies greatly. Factors such as temperature, humidity, and

4033-461: Is the body's accessibility to insects, particularly flies . On the surface in tropical areas, invertebrates alone can easily reduce a fully fleshed corpse to clean bones in under two weeks. The skeleton itself is not permanent; acids in soils can reduce it to unrecognizable components. This is one reason given for the lack of human remains found in the wreckage of the Titanic , even in parts of

4142-655: The Urnfield culture of the European Bronze Age . [2] During the Early Middle Ages , the reopening of graves and manipulation of the corpses or artifacts contained within them was a widespread phenomenon and a common part of the life course of early medieval cemeteries across Western and Central Europe . The reopening of furnished or recent burials occurred over the broad zone of European row-grave-style furnished inhumation burial, especially from

4251-579: The Body Farm ) in Knoxville, Tennessee , has several bodies laid out in various situations in a fenced-in plot near the medical center. Scientists at the Body Farm study how the human body decays in various circumstances to gain a better understanding of decomposition. Decomposition of plant matter occurs in many stages. It begins with leaching by water; the most easily lost and soluble carbon compounds are liberated in this process. Another early process

4360-414: The chemical process of decomposition , which breaks down the main components of the body. With death the microbiome of the living organism collapses and is followed by the necrobiome that undergoes predictable changes over time. Among those animals that have a heart, the fresh stage begins immediately after the heart stops beating. From the moment of death, the body begins cooling or warming to match

4469-477: The cholera epidemic of 1831 , which killed 52,000 people in Britain alone, putting unprecedented pressure on the country's burial capacity. Concerns were also raised about the potential public health hazard arising from the inhalation of gases generated from human putrefaction under the then prevailing miasma theory of disease. Legislative action was slow in coming, but in 1832 Parliament finally acknowledged

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4578-507: The grass can grow over and cover the plaque, to the distress of families who can no longer easily locate the grave. Grasses that propagate by an above-ground stolon (runner) can cover a plaque very quickly. Grasses that propagate by a below-ground rhizome tend not to cover the plaque as easily. The lawn beam cemetery, a recent development, seeks to solve the problems of the lawn cemetery while retaining many of its benefits. Low (10–15 cm) raised concrete slabs (beams) are placed across

4687-679: The 5th to the 8th centuries CE, which comprised the regions of today's Romania , Hungary , the Czech Republic , Slovakia , Switzerland , Austria , Germany , the Low Countries , France , and south-eastern England . From about the 7th century CE, in Europe a burial was under the control of the Church and could only take place on consecrated church ground. Practices varied, but in continental Europe, bodies were usually buried in

4796-467: The Laying Out, Planting and Managing of Cemeteries (1843) was very influential on designers and architects of the period. Loudon himself designed three cemeteries – Bath Abbey Cemetery , Histon Road Cemetery, Cambridge , and Southampton Old Cemetery . The Metropolitan Burial Act of 1852 legislated for the establishment of the first national system of government-funded municipal cemeteries across

4905-572: The United States was Mount Auburn Cemetery near Boston , Massachusetts, founded by the Massachusetts Horticultural Society in 1831. Following the establishment of Mount Auburn, dozens of other "rural" cemeteries were established in the United States ;– perhaps in part because of Supreme Court Justice Joseph Story 's dedication address – and there were dozens of dedication addresses, including

5014-506: The absence of a proscribed Perpetual Care and Maintenance Fund), over time many headstones are forgotten about and decay and become damaged. For cemetery authorities, monumental cemeteries are difficult to maintain. While cemeteries often have grassed areas between graves, the layout of graves makes it difficult to use modern equipment such as ride-on lawn mowers in the cemetery. Often the maintenance of grass must be done by more labour-intensive (and therefore expensive) methods. In order to reduce

5123-455: The animal itself, by the people handling the meat, and by their implements. Meat can be kept edible for a much longer time – though not indefinitely – if proper hygiene is observed during production and processing, and if appropriate food safety, food preservation and food storage procedures are applied. Spoilage of food is attributed to contamination from microorganisms such as bacteria, molds and yeasts, along with natural decay of

5232-566: The bacteria that cause putrefaction. In extremely dry or cold conditions, the normal process of decomposition is halted – by either lack of moisture or temperature controls on bacterial and enzymatic action – causing the body to be preserved as a mummy . Frozen mummies commonly restart the decomposition process when thawed (see Ötzi the Iceman ), whilst heat-desiccated mummies remain so unless exposed to moisture. The bodies of newborns who never ingested food are an important exception to

5341-441: The beam, the blades cannot damage the plaques. Up on the beam, the plaques cannot be easily overgrown by grass, and spaces between the plaques permit families to place flowers and other objects out of reach of the mowing. A natural cemetery, eco-cemetery , green cemetery or conservation cemetery , is a new style of cemetery as an area set aside for natural burials (with or without coffins ). Natural burials are motivated by

5450-430: The body and create a cadaver decomposition island (CDI). Liquefaction of tissues and disintegration become apparent during this time and strong odors persist. The end of active decay is signaled by the migration of maggots away from the body to pupate. Decomposition is largely inhibited during advanced decay due to the loss of readily available cadaveric material. Insect activity is also reduced during this stage. When

5559-463: The body and provide more surface area for the development of fly larvae and the activity of aerobic microorganisms. The purging of gases and fluids results in the strong distinctive odors associated with decay. Active decay is characterized by the period of greatest mass loss. This loss occurs as a result of both the voracious feeding of maggots and the purging of decomposition fluids into the surrounding environment. The purged fluids accumulate around

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5668-417: The body seen by mourners , such as the face and hands. The chemicals used in embalming repel most insects and slow down bacterial putrefaction by either killing existing bacteria in or on the body themselves or by fixing cellular proteins, which means that they cannot act as a nutrient source for subsequent bacterial infections. In sufficiently dry environments, an embalmed body may end up mummified and it

5777-412: The body's tissues. Maggot activity, typically confined to natural orifices, and masses under the skin, causes the skin to slip, and hair to detach from the skin. Maggot feeding, and the accumulation of gases within the body, eventually leads to post-mortem skin ruptures which will then further allow purging of gases and fluids into the surrounding environment. Ruptures in the skin allow oxygen to re-enter

5886-475: The capacity of holding many bodies simultaneously. Such vaults include windows for people to peer through and are usually decorated ornately with text, drawings, and patterns. At least one resident believes that the graves unique in the region because many are not oriented toward Mecca , and therefore must pre-date Islam . Graves are terraced in Yagoto Cemetery , which is an urban cemetery situated in

5995-459: The carcass is located on soil, the area surrounding it will show evidence of vegetation death. The CDI surrounding the carcass will display an increase in soil carbon and nutrients such as phosphorus , potassium , calcium and magnesium ; changes in pH; and a significant increase in soil nitrogen . As the ecosystem recovers from the disturbance, the CDI moves into the dry/remains stage, which

6104-403: The case of his murder was re-opened in the 1990s. Bodies submerged in a peat bog may become naturally embalmed , arresting decomposition and resulting in a preserved specimen known as a bog body . The generally cool and anoxic conditions in these environments limits the rate of microbial activity, thus limiting the potential for decomposition. The time for an embalmed body to be reduced to

6213-479: The causes of that deterioration. The rural cemetery or garden cemetery is a style of burial ground that uses landscaping in a park-like setting. It was conceived in 1711 by the British architect Sir Christopher Wren , who advocated the creation of landscaped burial grounds which featured well-planned walkways which gave extensive access to graves and planned plantings of trees, bushes, and flowers. Wren's idea

6322-424: The cemetery and makes it difficult to use the larger mowers . While cemetery authorities increasingly impose restrictions on the nature and type of objects that can be placed on lawn graves and actively remove prohibited items, grieving families are often unwilling to comply with these restrictions and become very upset if the items are removed. Another problem with lawn cemeteries involves grass over-growth over time:

6431-404: The cemetery. Commemorative plaques (usually standardised in terms of size and materials similar to lawn cemeteries) stand on these beams adjacent to each grave. As in a lawn cemetery, grass grows over the graves themselves. The areas between the beams are wide enough to permit easy mowing with a larger mower. As the mower blades are set lower than the top of the beam and the mowers do not go over

6540-453: The chief source of the unmistakably putrid odor of decaying animal tissue. Prime decomposers are bacteria or fungi , though larger scavengers also play an important role in decomposition if the body is accessible to insects , mites and other animals. Additionally, soil animals are considered key regulators of decomposition at local scales but their role at larger scales is unresolved. The most important arthropods that are involved in

6649-668: The city to the Catacombs of Paris . The bones of an estimated six million people are to be found there. An early example of a landscape-style cemetery is Père Lachaise in Paris. This embodied the idea of state - rather than church-controlled burial, a concept that spread through the continent of Europe with the Napoleonic invasions . This could include the opening of cemeteries by private or joint stock companies. The shift to municipal cemeteries or those established by private companies

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6758-400: The country, opening the way for a massive expansion of burial facilities throughout the late 19th century. In the United States, rural cemeteries became recreational areas in a time before public parks, hosting events from casual picnics to hunts and carriage races. There are a number of different styles of cemetery in use. Many cemeteries have areas based on different styles, reflecting

6867-411: The dead nor provide a place for the wider circle of friends and family to come to mourn or visit. Therefore, many cemeteries now provide walls (typically of brick or rendered brick construction) with a rectangular array of niches, with each niche being big enough to accommodate a person's cremated remains. Columbarium walls are a very space-efficient use of land in a cemetery compared with burials and

6976-420: The difficult weather. In the past, some Arab winters lasted for more than six months and would be accompanied with much rain and fog, impeding movement. But due to tribal rivalries many families would guard their cemeteries and put restrictions on who was buried in them. Across Baha, burial grounds have been constructed in different ways. Some cemeteries consist of underground vaults or concrete burial chambers with

7085-414: The distention of the abdomen and gives a cadaver its overall bloated appearance. The gases produced also cause natural liquids and liquefying tissues to become frothy. As the pressure of the gases within the body increases, fluids are forced to escape from natural orifices, such as the nose, mouth and anus, and enter the surrounding environment. The buildup of pressure combined with the loss of integrity of

7194-461: The diversity of cultural practices around death and how it changes over time. The urban cemetery is a burial ground located in the interior of a village, town, or city. Early urban cemeteries were churchyards, which filled quickly and exhibited a haphazard placement of burial markers as sextons tried to squeeze new burials into the remaining space. As new burying grounds were established in urban areas to compensate, burial plots were often laid out in

7303-875: The early stages of the Industrial Revolution , continued outbreaks of infectious disease near graveyards and the increasingly limited space in graveyards for new interments . In many European states, burial in graveyards was eventually outlawed altogether through legislation . Instead of graveyards, completely new places of burial were established away from heavily populated areas and outside of old towns and city centers. Many new cemeteries became municipally owned or were run by their own corporations, and thus independent from churches and their churchyards. In some cases, skeletons were exhumed from graveyards and moved into ossuaries or catacombs . A large action of this type occurred in 18th century Paris when human remains were transferred from graveyards all over

7412-431: The famous Gettysburg Address of President Abraham Lincoln. The cost of building a garden/rural cemetery often meant that only the wealthy could afford burial there. Subsequently, garden/rural cemeteries often feature above-ground monuments and memorials, mausoleums , and columbaria . The excessive filling of rural/garden cemeteries with elaborate above-ground memorials, many of dubious artistic quality or taste, created

7521-521: The field of cemetery management." Typically, lawn cemeteries comprise a number of graves in a lawn setting with trees and gardens on the perimeter. Adolph Strauch introduced this style in 1855 in Cincinnati . While aesthetic appeal to family members has been the primary driver for the development of lawn cemeteries, cemetery authorities initially welcomed this new style of cemetery enthusiastically, expecting easier maintenance. Selecting (or grading)

7630-399: The first carrion insects to arrive and they seek a suitable oviposition site. The bloat stage provides the first clear visual sign that microbial proliferation is underway. In this stage, anaerobic metabolism takes place, leading to the accumulation of gases, such as hydrogen sulfide , carbon dioxide , methane and nitrogen . The accumulation of gases within the bodily cavity causes

7739-411: The food. These decomposition bacteria reproduce at rapid rates under conditions of moisture and preferred temperatures. When the proper conditions are lacking the bacteria may form spores which lurk until suitable conditions arise to continue reproduction. Decomposition rates and speed may differ or vary due to abiotic factors such as moisture level, temperature, and soil type. They also vary depending on

7848-425: The forest floor. Lignin is one such remaining product of decomposing plants with a very complex chemical structure, causing the rate of microbial breakdown to slow. Warmth increases the speed of plant decay by roughly the same amount, regardless of the composition of the plant. In most grassland ecosystems, natural damage from fire , detritivores that feed on decaying matter, termites , grazing mammals, and

7957-518: The human body releases significant pathogenic bacteria, fungi, protozoa, and viruses which can cause disease and illness, and many urban cemeteries were located without consideration for local groundwater. Modern burials in urban cemeteries also release toxic chemicals associated with embalming, such as arsenic, formaldehyde , and mercury. Coffins and burial equipment can also release significant amounts of toxic chemicals such as arsenic (used to preserve coffin wood) and formaldehyde (used in varnishes and as

8066-436: The initial amount of breakdown caused by the prior consumers in the food chain . This means the form that organic matter is in, original plant or animal, partially eaten, or as faecal matter when the detritivore encounters it. The more broken down the matter, the faster the final decomposition. The rate of decomposition is governed by three sets of factors: the physical environment (temperature, moisture and soil properties),

8175-406: The labour cost, devices such as string trimmers are increasingly used in cemetery maintenance, but such devices can damage the monuments and headstones. Cemetery authorities dislike the criticism they receive for the deteriorating condition of the headstones, arguing that they have no responsibility for the upkeep of headstones, and typically disregard their own maintenance practices as being one of

8284-546: The land intended for a lawn cemetery so that it is completely flat allows the use of large efficient mowers (such as ride-on mowers or lawn tractors) - the plaques (being horizontally set in the ground) lie below the level of the blades and are not damaged by the blades. In practice, while families are often initially attracted to the uncluttered appearance of a lawn cemetery, the common practice of placing flowers (sometimes in vases ) and increasingly other items (e.g. small toys on children's graves) re-introduces some clutter to

8393-457: The land is specifically designated as a burial ground and originally applied to the Roman catacombs . The term graveyard is often used interchangeably with cemetery, but a graveyard primarily refers to a burial ground within a churchyard . The intact or cremated remains of people may be interred in a grave, commonly referred to as burial , or in a tomb , an "above-ground grave" (resembling

8502-437: The latter means "the metabolic breakdown of materials into simpler components by living organisms", typically by microorganisms. Decomposition begins at the moment of death, caused by two factors: autolysis , the breaking down of tissues by the body's own internal chemicals and enzymes , and putrefaction , the breakdown of tissues by bacteria . These processes release compounds such as cadaverine and putrescine , that are

8611-437: The location of the dead, so grieving family and friends can visit the precise location of a grave. Columbarium walls are a common feature of many cemeteries, reflecting the increasing use of cremation rather than burial . While cremated remains can be kept at home by families in urns or scattered in some significant or attractive place, neither of these approaches allows for a long-lasting commemorative plaque to honour

8720-489: The material available to decomposers is another major factor that influences the rate of decomposition. Substances like sugars and amino acids decompose readily and are considered labile. Cellulose and hemicellulose , which are broken down more slowly, are "moderately labile". Compounds which are more resistant to decay, like lignin or cutin , are considered recalcitrant. Litter with a higher proportion of labile compounds decomposes much more rapidly than does litter with

8829-449: The need for the establishment of large municipal cemeteries and encouraged their construction outside London. The same bill also closed all inner London churchyards to new deposits. The Magnificent Seven , seven large cemeteries around London, were established in the following decade, starting with Kensal Green in 1832. Urban planner and author John Claudius Loudon was one of the first professional cemetery designers, and his book On

8938-524: The niches may be assigned by the cemetery authorities or families may choose from the unoccupied niches available. It is usually possible to purchase (or pay a deposit) to reserve the use of adjacent niches for other family members. The use of adjacent niches (vertically or horizontally) usually permits a larger plaque spanning all the niches involved, which provides more space for the writing. As with graves, there may be separate columbarium walls for different religions or for war veterans. As with lawn cemeteries,

9047-426: The normal process of decomposition. They lack the internal microbial flora that produces much of decomposition and quite commonly mummify if kept in even moderately dry conditions. Aerobic decomposition takes place in the presence of oxygen. This is most common to occur in nature. Living organisms that use oxygen to survive feed on the body. Anaerobic decomposition takes place in the absence of oxygen. This could be

9156-399: The original expectation was that people would prefer the uncluttered simplicity of a wall of plaques, but the practice of leaving flowers is very entrenched. Mourners leave flowers (and other objects) on top of columbarium walls or at the base, as close as they can to the plaque of their family member. In some cases, it is possible to squeeze a piece of wire or string under the plaque allowing

9265-497: The other because of diseases. So the villagers would dig graves close by burying members of the same family in one area. That was how the family and tribal burial grounds came about... If the family ran out of space, they would open old graves where family members had been buried before and add more people to them. This process is known as khashf . During famines and outbreaks of epidemics huge numbers of people would die and many tribes faced difficulties in digging new graves because of

9374-456: The physical movement of animals through the grass are the primary agents of breakdown and nutrient cycling , while bacteria and fungi play the main roles in further decomposition. The chemical aspects of plant decomposition always involve the release of carbon dioxide . In fact, decomposition contributes over 90 percent of carbon dioxide released each year. The decomposition of food, either plant or animal, called spoilage in this context,

9483-410: The place of burial. Usually, the more writing and symbols carved on the headstone, the more expensive it was. As with most other human property such as houses and means of transport, richer families used to compete for the artistic value of their family headstone in comparison to others around it, sometimes adding a statue (such as a weeping angel ) on the top of the grave. Those who could not pay for

9592-423: The plaques. Thus, the niches are typically placed between 1 metre to 2 metres above the ground so the plaques can be easily read by an adult. Some columbarium walls have niches going close to ground level, but these niches are usually unpopular with families as it is difficult to read the plaque without bending down very low (something older people in particular find difficult or uncomfortable to do). As with graves,

9701-500: The position of the body, these parts would vary. For instance, if the person was flat on their back when they died, the blood would collect in the parts that are touching the ground. If the person was hanging, it would collect in their fingertips, toes and earlobes. Once the heart stops, the blood can no longer supply oxygen or remove carbon dioxide from the tissues. The resulting decrease in pH and other chemical changes cause cells to lose their structural integrity , bringing about

9810-461: The process include carrion beetles , mites, the flesh-flies (Sarcophagidae) and blow-flies ( Calliphoridae ), such as the green bottle flies seen in the summer. In North America, the most important non-insect animals that are typically involved in the process include mammal and bird scavengers, such as coyotes , dogs , wolves , foxes , rats , crows and vultures . Some of these scavengers also remove and scatter bones, which they ingest at

9919-415: The process of decomposition. Nonetheless, urban cemeteries which were heavily used were often very unhealthy. Receiving vaults and crypts often needed to be aired before entering, as decomposing corpses used up so much oxygen that even candles could not remain lit. The sheer stench from decomposing corpses, even when buried deeply, was overpowering in areas adjacent to the urban cemetery. Decomposition of

10028-431: The proliferation of anaerobic organisms . These multiply, consuming the body's carbohydrates , lipids and proteins , to produce a variety of substances including propionic acid , lactic acid , methane , hydrogen sulfide and ammonia . The process of microbial proliferation within a body is referred to as putrefaction and leads to the second stage of decomposition known as bloat. Blowflies and flesh flies are

10137-423: The property but technically not owned with it. Often, cemeteries are relocated to accommodate building. However, if the cemetery is not relocated, descendants of people buried there may visit the cemetery. There is also the practice of families with large estates choosing to create private cemeteries in the form of burial sites, monuments , crypts , or mausoleums on their property; the mausoleum at Fallingwater

10246-481: The quantity and quality of the dead material available to decomposers, and the nature of the microbial community itself. Decomposition rates are low under very wet or very dry conditions. Decomposition rates are highest in damp, moist conditions with adequate levels of oxygen. Wet soils tend to become deficient in oxygen (this is especially true in wetlands ), which slows microbial growth. In dry soils, decomposition slows as well, but bacteria continue to grow (albeit at

10355-430: The quick re-use of grave sites in comparison with conventional burials. However, it is unclear if reusing cemetery land will be culturally acceptable to most people. In keeping with the intention of "returning to nature" and the early re-use potential, natural cemeteries do not normally have conventional grave markings such as headstones . Instead, exact GPS recordings and or the placing of a tree, bush or rock often marks

10464-516: The release of cellular enzymes capable of initiating the breakdown of surrounding cells and tissues. This process is known as autolysis . Visible changes caused by decomposition are limited during the fresh stage, although autolysis may cause blisters to appear at the surface of the skin. The small amount of oxygen remaining in the body is quickly depleted by cellular metabolism and aerobic microbes naturally present in respiratory and gastrointestinal tracts, creating an ideal environment for

10573-431: The relevant place of worship with an indication of their name, date of death and other biographical data. In Europe, this was often accompanied by a depiction of their coat of arms . Most others were buried in graveyards again divided by social status. Mourners who could afford the work of a stonemason had a headstone engraved with a name, dates of birth and death and sometimes other biographical data, and set up over

10682-485: The same as when they died. In some religious groups, this is known as incorruptibility . It is not known whether or for how long a body can stay free of decay without artificial preservation. Various sciences study the decomposition of bodies under the general rubric of forensic science because the usual motive for such studies is to determine the time and cause of death for legal purposes: The University of Tennessee Anthropological Research Facility (better known as

10791-425: The season of death all determine how fast a fresh body will skeletonize or mummify . A basic guide for the effect of environment on decomposition is given as Casper 's Law (or Ratio): if all other factors are equal, then, when there is free access of air a body decomposes twice as fast as if immersed in water and eight times faster than if buried in the earth. Ultimately, the rate of bacterial decomposition acting on

10900-429: The ship considered inaccessible to scavengers. Freshly skeletonized bone is often called green bone and has a characteristic greasy feel. Under certain conditions (underwater, but also cool, damp soil), bodies may undergo saponification and develop a waxy substance called adipocere , caused by the action of soil chemicals on the body's proteins and fats . The formation of adipocere slows decomposition by inhibiting

11009-435: The skin may also cause the body to rupture. Intestinal anaerobic bacteria transform haemoglobin into sulfhemoglobin and other colored pigments. The associated gases which accumulate within the body at this time aid in the transport of sulfhemoglobin throughout the body via the circulatory and lymphatic systems , giving the body an overall marbled appearance. If insects have access, maggots hatch and begin to feed on

11118-464: The temperature of the ambient environment, during a stage called algor mortis . Shortly after death, within three to six hours, the muscular tissues become rigid and incapable of relaxing, during a stage called rigor mortis . Since blood is no longer being pumped through the body, gravity causes it to drain to the dependent portions of the body, creating an overall bluish-purple discoloration termed livor mortis or, more commonly, lividity. Depending on

11227-408: The tissue will depend upon the temperature of the surroundings. Colder temperatures decrease the rate of decomposition while warmer temperatures increase it. A dry body will not decompose efficiently. Moisture helps the growth of microorganisms that decompose the organic matter, but too much moisture could lead to anaerobic conditions slowing down the decomposition process. The most important variable

11336-473: The top of the cemetery to create new burial space. A monumental cemetery is the traditional style of cemetery where headstones or other monuments made of marble , granite or similar materials rise vertically above the ground (typically around 50 cm but some can be over 2 metres high). Often the entire grave is covered by a slab, commonly concrete , but it can be more expensive materials such as marble or granite , and/or has its boundaries delimited by

11445-403: The urban area, and many urban cemeteries in the late 20th century touted their role as an environmental refuge. Many urban cemeteries are characterized by multiple burials in the same grave. Multiple burials is a consequence of the limited size of the urban cemetery, which cannot easily expand due to adjacent building development. It was not uncommon for an urban cemetery to begin adding soil to

11554-515: Was constructed in 1918 and features Gothic Revival architecture . It is located in the center of one of the original sections of the cemetery. Many local residents, some of whom were nationally prominent, are buried there. Cemetery A cemetery , burial ground , gravesite , graveyard , or a green space called a memorial park , is a place where the remains of dead people are buried or otherwise interred. The word cemetery (from Greek κοιμητήριον ' sleeping place ' ) implies that

11663-499: Was not immediately accepted. But by the early 1800s, existing churchyards were growing overcrowded and unhealthy, with graves stacked upon each other or emptied and reused for new burials. As a reaction to this, the first "garden" cemetery – Père Lachaise Cemetery in Paris  – opened in 1804. Because these cemeteries were usually on the outskirts of town (where land was plentiful and cheap), they were called " rural cemeteries ",

11772-619: Was not uncommon in some places, such as England, for fresher corpses to be chopped up to aid decomposition, and for bones to be burned to create fertilizer. The re-use of graves allowed for a steady stream of income, which enabled the cemetery to remain well-maintained and in good repair. Not all urban cemeteries engaged in re-use of graves, and cultural taboos often prevented it. Many urban cemeteries have fallen into disrepair and become overgrown, as they lacked endowments to fund perpetual care. Many urban cemeteries today are thus home to wildlife, birds, and plants which cannot be found anywhere else in

11881-540: Was usually accompanied by the establishing of landscaped burial grounds outside the city (e.g. extramural). In Britain the movement was driven by dissenters and public health concerns. The Rosary Cemetery in Norwich was opened in 1819 as a burial ground for all religious backgrounds. Similar private non-denominational cemeteries were established near industrialising towns with growing populations, such as Manchester (1821) and Liverpool (1825). Each cemetery required

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