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The Katian is the second stage of the Upper Ordovician . It is preceded by the Sandbian and succeeded by the Hirnantian Stage. The Katian began 453 million years ago and lasted for about 7.8 million years until the beginning of the Hirnantian 445.2 million years ago. During the Katian the climate cooled which started the Late Ordovician glaciation .

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16-764: The name Katian is derived from Katy Lake ( Atoka County , Oklahoma , United States). The GSSP of the Katian Stage is the Black Knob Ridge Section in southeastern Oklahoma (United States). It is an outcrop of the Womble Shale and the Bigfork Chert , the latter containing the lower boundary of the Katian. The lower boundary is defined as the first appearance datum of the graptolite species Diplacanthograptus caudatus . This horizon

32-528: Is 4.0 m above the base of the Bigfork Chert. 34°25′50″N 96°04′29″W  /  34.4305°N 96.0746°W  / 34.4305; -96.0746 This article related to the Ordovician period is a stub . You can help Misplaced Pages by expanding it . Atoka County, Oklahoma Atoka County is a county located in the U.S. state of Oklahoma . As of the 2020 census ,

48-676: Is a tributary of Muddy Boggy Creek . According to some sources, Clear Boggy Creek joins with Muddy Boggy Creek to form the Boggy River. Federal topographic maps and the Geographic Names Information System show Clear Boggy Creek as a tributary to Muddy Boggy Creek, which retains its name below the confluence. Its gradient is about 15 feet per mile near its headwaters and 3 feet per mile near Boggy Depot and below. Water in Clear Boggy Creek

64-544: Is in southeastern Oklahoma, in a 10-county area designated for tourism purposes by the Oklahoma Department of Tourism and Recreation as Choctaw Country . According to the U.S. Census Bureau , the county has a total area of 990 square miles (2,600 km ), of which 976 square miles (2,530 km ) is land and 14 square miles (36 km ) (1.5%) is water. Atoka County is drained by North Boggy, Clear Boggy and Muddy Boggy Creeks , which are tributaries of

80-712: The 2010 United States Census , there were 14,182 people, 4,964 households, and 3,504 families residing in the county. The population density was 14 people per square mile (5.4 people/km ). There were 5,673 housing units at an average density of 6 units per square mile (2.3/km ). 73.8% of the population were White , 13.8% Native American , 3.7% Black or African American , 0.4% Asian , 1.1% of some other race and 7.1% of two or more races . 2.9% were Hispanic or Latino (of any race). 24.5% were of American , 11.7% Irish and 8.5% German ancestry. 97.4% spoke English and 1.4% Spanish as their first language. There were 4,964 households, out of which 31.30% had children under

96-520: The Red River , and by McGee Creek , which is a tributary of Muddy Boggy Creek. Atoka Reservoir is in the northern section of the county. The Ouachita Mountains are in the eastern part of the county, while the Sandstone Hills and Coastal Plains physiographic regions provide a more level terrain suitable for agriculture in the north and western part of the county. About 12 miles WSW of

112-602: The Choctaw Nation. Within that district, it was in parts of Atoka , Blue , and Jack's Fork counties. The Choctaw named their Atoka County in honor of Chief Atoka, a leader of a party that migrated from Georgia to Indian Territory; the name was retained when Oklahoma became a state. In 1858, the Butterfield Overland Mail established a stagecoach route through the area. It carried passengers, US Mail, and some freight. One station, Waddell's,

128-542: The State of Oklahoma, whose county boundaries follow the precise north–south, east–west grid established with the state's township and range system, the Choctaw Nation established its internal divisions using easily recognizable landmarks, such as mountains and rivers, as borders. The territory of present-day Atoka County fell within the Pushmataha District , one of the three administrative super-regions comprising

144-429: The age of 18 living with them, 56.90% were married couples living together, 10.20% had a female householder with no husband present, and 29.40% were non-families. 27.10% of all households were made up of individuals, and 13.90% had someone living alone who was 65 years of age or older. The average household size was 2.48 and the average family size was 3.01. In the county, the population was spread out, with 23.60% under

160-469: The age of 18, 8.20% from 18 to 24, 29.10% from 25 to 44, 24.30% from 45 to 64, and 14.80% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 117.80 males. For every 100 females age 18 and over, there were 119.90 males. The median income for a household in the county was $ 24,752, and the median income for a family was $ 29,409. Males had a median income of $ 26,193 versus $ 18,861 for females. The per capita income for

176-581: The county was $ 12,919. About 15.70% of families and 19.80% of the population were below the poverty line , including 25.40% of those under age 18 and 21.10% of those age 65 or over. The Oklahoma Department of Corrections operates the Mack Alford Correctional Center in an unincorporated area , near Stringtown . K-12 school districts include: There is one elementary school district, Lane Public School . Previously another elementary school district, Farris Public School ,

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192-591: The importance of Atoka, but lack of the railroad contributed to the decline of Boggy Depot. The economy of Atoka County has been largely built on coal mining, limestone quarrying, forestry, and agriculture. Cattle raising became the leading business in the mid-twentieth century. A major employer is the Oklahoma State Penitentiary Farm (renamed the Mack H. Alford Correctional Center), a medium-security prison that opened in 1933. Atoka County

208-501: The population was 14,143. Its county seat is Atoka . The county was formed before statehood from Choctaw Lands , and its name honors a Choctaw Chief named Atoka. The county is part of Choctaw Nation reservation lands. The area forming Atoka County was part of the Choctaw Nation after the tribe was forced to relocate in the early 1830s to Indian Territory from its home in the Southeastern United States. Unlike

224-478: The town of Atoka is Boggy Depot State Park , the historic site of a once large community on the Butterfield Overland Mail stagecoach route. The Katian Age of the Ordovician Period of geological time is named for Katy Lake, which is two miles north east of Atoka . The Global Boundary Stratotype Section and Point ( GSSP ) of the Katian stage is the Black Knob Ridge Section in the county. As of

240-750: Was in operation. In 2013 the Farris district closed and consolidated into the Lane district. The following sites in Atoka County are listed on the National Register of Historic Places : 34°23′N 96°03′W  /  34.38°N 96.05°W  / 34.38; -96.05 Clear Boggy Creek Clear Boggy Creek , also known as the Clear Boggy River , is a 132-mile-long (212 km) creek in southeastern Oklahoma that

256-740: Was near Wesley ; a second station, Geary's, was between Waddell's and the Muddy Boggy River , while a third was at Boggy Depot. During the Civil War, Confederate troops established a supply depot named Camp Boggy Depot here. After the war, the town of Atoka was established. In 1872, the Missouri-Kansas-Texas Railway (nicknamed the Christopher Casey) built a track through the county. It bypassed Boggy Depot and passed through Atoka; this access increased

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