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41-474: Stavanger Peninsula includes Randaberg municipality, as well as parts of Stavanger , Sandnes , and Sola municipalities. The name Stavanger Peninsula is occasionally used interchangeably with North Jæren ( Norwegian : Nord-Jæren ), but the former is a geographical region, while the latter is a political definition. 58°56′N 5°42′E  /  58.933°N 5.700°E  / 58.933; 5.700 This Rogaland location article

82-420: A laboratory or factory . Mining in a wider sense comprises extraction of any resource (e.g. petroleum , natural gas , salt or even water ) from the earth. Mining of rock and metals has been done since prehistoric times. Modern mining processes involve prospecting for mineral deposits, analysis of the profit potential of a proposed mine, extraction of the desired materials, and finally reclamation of

123-402: A fourth class of rocks alongside igneous, sedimentary, and metamorphic. Rock varies greatly in strength, from quartzites having a tensile strength in excess of 300 MPa to sedimentary rock so soft it can be crumbled with bare fingers (that is, it is friable ). (For comparison, structural steel has a tensile strength of around 350 MPa. ) Relatively soft, easily worked sedimentary rock

164-433: A huge impact on the cultural and technological development of the human race. Rock has been used by humans and other hominids for at least 2.5 million years . Lithic technology marks some of the oldest and continuously used technologies. The mining of rock for its metal content has been one of the most important factors of human advancement, and has progressed at different rates in different places, in part because of

205-562: A source area and then transported to the place of deposition by water , wind , ice , mass movement or glaciers (agents of denudation ). About 7.9% of the crust by volume is composed of sedimentary rocks, with 82% of those being shales, while the remainder consists of 6% limestone and 12% sandstone and arkoses . Sedimentary rocks often contain fossils . Sedimentary rocks form under the influence of gravity and typically are deposited in horizontal or near horizontal layers or strata , and may be referred to as stratified rocks. Sediment and

246-713: A texture are referred to as foliated ; the remainders are termed non-foliated. The name of the rock is then determined based on the types of minerals present. Schists are foliated rocks that are primarily composed of lamellar minerals such as micas . A gneiss has visible bands of differing lightness , with a common example being the granite gneiss. Other varieties of foliated rock include slates , phyllites , and mylonite . Familiar examples of non-foliated metamorphic rocks include marble , soapstone , and serpentine . This branch contains quartzite —a metamorphosed form of sandstone —and hornfels . Though most understanding of rocks comes from those of Earth, rocks make up many of

287-400: Is berg which means "mountain", "rock" or "cliff". Before the early 1900s, the area was known as Randeberg . The coat of arms was granted on 26 June 1981. The official blazon is " Azure , fourteen plates in orle " ( Norwegian : I blått 14 sølv mynter langs randen ). This means the arms have a blue field (background) and the charge is a set of fourteen circles that outline

328-549: Is a stub . You can help Misplaced Pages by expanding it . Randaberg Randaberg is a municipality in Rogaland county, Norway . It is located in the traditional district of Jæren , at the northern end of the Stavanger Peninsula . The administrative centre of the municipality is the village of Randaberg . Randaberg is located just north of the city of Stavanger . It is the northernmost conurbation of

369-608: Is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its chemical composition , and the way in which it is formed. Rocks form the Earth's outer solid layer, the crust , and most of its interior, except for the liquid outer core and pockets of magma in the asthenosphere . The study of rocks involves multiple subdisciplines of geology, including petrology and mineralogy . It may be limited to rocks found on Earth, or it may include planetary geology that studies

410-458: Is formed through the cooling and solidification of magma or lava . This magma may be derived from partial melts of pre-existing rocks in either a planet 's mantle or crust . Typically, the melting of rocks is caused by one or more of three processes: an increase in temperature, a decrease in pressure, or a change in composition. Igneous rocks are divided into two main categories: Magmas tend to become richer in silica as they rise towards

451-558: Is governed by a municipal council of directly elected representatives. The mayor is indirectly elected by a vote of the municipal council. The municipality is under the jurisdiction of the Sør-Rogaland District Court and the Gulating Court of Appeal . The municipal council ( Kommunestyre ) of Randaberg is made up of 27 representatives that are elected to four year terms. The tables below show

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492-442: Is next in importance. About 65% of the Earth's crust by volume consists of igneous rocks. Of these, 66% are basalt and gabbro , 16% are granite, and 17% granodiorite and diorite . Only 0.6% are syenite and 0.3% are ultramafic . The oceanic crust is 99% basalt, which is an igneous rock of mafic composition. Granite and similar rocks, known as granitoids , dominate the continental crust . Sedimentary rocks are formed at

533-536: Is still an active agricultural community, and produces over 80% of Norway's parsley . About 3/5 of the land is arable, and about 2% of the inhabitants are engaged in agriculture. Dairy production, chickens, and pigs are important industries. Only Klepp municipality surpasses Randaberg and has more agricultural production in Rogaland county. The first potatoes every year are grown here in Randaberg and are given to

574-454: Is the 350th largest by area out of the 356 municipalities in Norway. Randaberg is the 99th most populous municipality in Norway with a population of 11,671. The municipality's population density is 483.7 inhabitants per square kilometre (1,253/sq mi) and its population has increased by 12.3% over the previous 10-year period. The parish of Randaberg was established on 1 July 1922 when it

615-453: Is the study of Earth and its components, including the study of rock formations. Petrology is the study of the character and origin of rocks. Mineralogy is the study of the mineral components that create rocks. The study of rocks and their components has contributed to the geological understanding of Earth's history, the archaeological understanding of human history, and the development of engineering and technology in human society. While

656-543: Is thought that Svarthola (local name: Vistehålå) was the main shelter for a group of 25 persons, from around 6000 BC. These people were mainly gatherers and hunters, but from around 4000 BC they also started farming. From around 2000 BC, their main activity was farming. Randaberg Municipality is responsible for primary education (through 10th grade), outpatient health services , senior citizen services, welfare and other social services , zoning , economic development , and municipal roads and utilities. The municipality

697-498: The Royal Family of Norway . However, due to its close proximity to the large city of Stavanger , the area is becoming more urban. There are three main suburbs of Stavanger where most of Randaberg's residents live: Randaberg sentrum (310 houses), Viste/Goa (315 houses), and Grødem (135 houses). Some of the first inhabitants of Norway settled here, and it is believed that the first people came here around 12,000 years ago. It

738-532: The Stavanger/Sandnes area, one of the largest urban areas in the country. The Byfjord Tunnel connects the islands of Stavanger Municipality to the east with the mainland of Randaberg. The Rogfast tunnel is going to be built from Randaberg, under the Boknafjorden , to the north side of the fjord as well as to the island of Kvitsøy . The 25-square-kilometre (9.7 sq mi) municipality

779-508: The beach in Randaberg. The arms were designed by Truls Nygaard who based it off a preliminary design by Magnus Hardeland. The municipal flag has the same design as the coat of arms, except that it is rectangular. The Church of Norway has one parish ( sokn ) within the municipality of Randaberg. It is part of the Tungenes prosti ( deanery ) in the Diocese of Stavanger . Randaberg

820-417: The history of geology includes many theories of rocks and their origins that have persisted throughout human history, the study of rocks was developed as a formal science during the 19th century. Plutonism was developed as a theory during this time, and the discovery of radioactive decay in 1896 allowed for the radiocarbon dating of rocks. Understanding of plate tectonics developed in the second half of

861-399: The 20th century. Rocks are composed primarily of grains of minerals, which are crystalline solids formed from atoms chemically bonded into an orderly structure. Some rocks also contain mineraloids , which are rigid, mineral-like substances, such as volcanic glass , that lack crystalline structure. The types and abundance of minerals in a rock are determined by the manner in which it

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902-467: The Earth's surface, a process called magma differentiation . This occurs both because minerals low in silica crystallize out of the magma as it begins to cool ( Bowen's reaction series ) and because the magma assimilates some of the crustal rock through which it ascends ( country rock ), and crustal rock tends to be high in silica. Silica content is thus the most important chemical criterion for classifying igneous rock. The content of alkali metal oxides

943-503: The Earth's surface: temperatures greater than 150 to 200 °C and pressures greater than 1500 bars. This occurs, for example, when continental plates collide. Metamorphic rocks compose 27.4% of the crust by volume. The three major classes of metamorphic rock are based upon the formation mechanism. An intrusion of magma that heats the surrounding rock causes contact metamorphism—a temperature-dominated transformation. Pressure metamorphism occurs when sediments are buried deep under

984-523: The constituent particles, and particle size . These physical properties are the result of the processes that formed the rocks. Over the course of time, rocks can be transformed from one type into another, as described by a geological model called the rock cycle . This transformation produces three general classes of rock: igneous , sedimentary and metamorphic . Those three classes are subdivided into many groups. There are, however, no hard-and-fast boundaries between allied rocks. By increase or decrease in

1025-424: The current and historical composition of the council by political party . The mayors ( Norwegian : ordfører ) of Randaberg: During the summer the beaches here are very popular, and among the finest in the area around Stavanger . This includes Sandestraen and Vistestraen . Hålandsvannet , a small lake, is also a popular place for swimming. Rock (geology) In geology , rock (or stone )

1066-496: The earliest humans. This early period, called the Stone Age , saw the development of many stone tools. Stone was then used as a major component in the construction of buildings and early infrastructure . Mining developed to extract rocks from the Earth and obtain the minerals within them, including metals . Modern technology has allowed the development of new human-made rocks and rock-like substances, such as concrete . Geology

1107-606: The earth's surface by the accumulation and cementation of fragments of earlier rocks, minerals, and organisms or as chemical precipitates and organic growths in water ( sedimentation ). This process causes clastic sediments (pieces of rock) or organic particles ( detritus ) to settle and accumulate or for minerals to chemically precipitate ( evaporite ) from a solution . The particulate matter then undergoes compaction and cementation at moderate temperatures and pressures ( diagenesis ). Before being deposited, sediments are formed by weathering of earlier rocks by erosion in

1148-427: The earth, from an ore body, vein or seam . The term also includes the removal of soil. Materials recovered by mining include base metals , precious metals , iron , uranium , coal , diamonds , limestone , oil shale , rock salt , potash , construction aggregate and dimension stone . Mining is required to obtain any material that cannot be grown through agricultural processes, or created artificially in

1189-402: The ground; pressure is dominant, and temperature plays a smaller role. This is termed burial metamorphism, and it can result in rocks such as jade . Where both heat and pressure play a role, the mechanism is termed regional metamorphism. This is typically found in mountain-building regions. Depending on the structure, metamorphic rocks are divided into two general categories. Those that possess

1230-491: The kind of metals available from the rock of a region. Anthropic rock is synthetic or restructured rock formed by human activity. Concrete is recognized as a human-made rock constituted of natural and processed rock and having been developed since Ancient Rome . Rock can also be modified with other substances to develop new forms, such as epoxy granite . Artificial stone has also been developed, such as Coade stone . Geologist James R. Underwood has proposed anthropic rock as

1271-431: The land to prepare it for other uses once mining ceases. Mining processes may create negative impacts on the environment both during the mining operations and for years after mining has ceased. These potential impacts have led to most of the world's nations adopting regulations to manage negative effects of mining operations. Stone tools have been used for millions of years by humans and earlier hominids . The Stone Age

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1312-418: The original rock was formed. This process is called metamorphism , meaning to "change in form". The result is a profound change in physical properties and chemistry of the stone. The original rock, known as the protolith , transforms into other mineral types or other forms of the same minerals, by recrystallization . The temperatures and pressures required for this process are always higher than those found at

1353-425: The particles of clastic sedimentary rocks can be further classified by grain size . The smallest sediments are clay , followed by silt , sand , and gravel . Some systems include cobbles and boulders as measurements. Metamorphic rocks are formed by subjecting any rock type—sedimentary rock, igneous rock or another older metamorphic rock—to different temperature and pressure conditions than those in which

1394-466: The proportions of their minerals, they pass through gradations from one to the other; the distinctive structures of one kind of rock may thus be traced, gradually merging into those of another. Hence the definitions adopted in rock names simply correspond to selected points in a continuously graduated series. Igneous rock (derived from the Latin word igneus, meaning of fire, from ignis meaning fire)

1435-641: The rocks of other celestial objects. Rocks are usually grouped into three main groups: igneous rocks , sedimentary rocks and metamorphic rocks . Igneous rocks are formed when magma cools in the Earth's crust, or lava cools on the ground surface or the seabed. Sedimentary rocks are formed by diagenesis and lithification of sediments , which in turn are formed by the weathering , transport, and deposition of existing rocks. Metamorphic rocks are formed when existing rocks are subjected to such high pressures and temperatures that they are transformed without significant melting. Humanity has made use of rocks since

1476-426: The shield. The charge has a tincture of argent which means it is commonly colored white, but if it is made out of metal, then silver is used. The circles are meant to symbolize silver coins. The arms are partly canting since the name of the municipality is derived from a word that means "edge" and the coins are placed around edge of the shield. The coins symbolize the ball-shaped stones found in large amounts on

1517-621: The universe's celestial bodies. In the Solar System , Mars , Venus , and Mercury are composed of rock, as are many natural satellites , asteroids , and meteoroids . Meteorites that fall to Earth provide evidence of extraterrestrial rocks and their composition. They are typically heavier than rocks on Earth. Asteroid rocks can also be brought to Earth through space missions, such as the Hayabusa mission. Lunar rocks and Martian rocks have also been studied. The use of rock has had

1558-408: Was a period of widespread stone tool usage. Early Stone Age tools were simple implements, such as hammerstones and sharp flakes. Middle Stone Age tools featured sharpened points to be used as projectile points , awls, or scrapers . Late Stone Age tools were developed with craftsmanship and distinct cultural identities. Stone tools were largely superseded by copper and bronze tools following

1599-456: Was formed. Most rocks contain silicate minerals , compounds that include silica tetrahedra in their crystal lattice , and account for about one-third of all known mineral species and about 95% of the earth's crust . The proportion of silica in rocks and minerals is a major factor in determining their names and properties. Rocks are classified according to characteristics such as mineral and chemical composition, permeability , texture of

1640-789: Was quarried for construction as early as 4000 BCE in Egypt, and stone was used to build fortifications in Inner Mongolia as early as 2800 BCE. The soft rock, tuff , is common in Italy, and the Romans used it for many buildings and bridges. Limestone was widely used in construction in the Middle Ages in Europe and remained popular into the 20th century. Mining is the extraction of valuable minerals or other geological materials from

1681-452: Was separated from the large municipality of Hetland . Initially, there were 1,256 residents of the new municipality. The municipal borders have not changed since that time. The municipality (originally the parish ) is named after the old Randaberg farm ( Old Norse : Randarberg ) since the first Randaberg Church was built there. The first element is the plural genitive case of rǫnd which means "edge" or "rim". The last element

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