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The area is sometimes called the Lower Plains, North Central Plains,or Rolling Plains. [2] The Osage Plains, covering west-central Missouri , the southeastern third of Kansas , most of central Oklahoma , and extending into north-central Texas , is the southernmost of three tallgrass prairie physiographic areas.
The physiographic regions of the contiguous United States comprise 8 divisions, 25 provinces, and 85 sections. [1] The system dates to Nevin Fenneman's report Physiographic Divisions of the United States, published in 1916. [2] [3] The map was updated and republished by the Association of American Geographers in 1928. [4]
The Springfield Plateau is the only Ozark Highland Level IV ecoregion within all four states. [1] The nearly level to rolling Springfield Plateau is underlain by cherty limestone of the Mississippian Boone Formation and Burlington Limestone; it is less rugged and wooded than Ecoregions 38, 39b, and 39c, and lacks the Ordovician dolomite and limestone of Ecoregions 39c and 39d.
Nashville Basin: Great Plains: Missouri Plateau, Glaciated: Missouri Plateau, Unglaciated: Black Hills: High Plains: Plains Border: Arctic Coastal Plain: Colorado Piedmont: Raton section Pecos Valley: Edwards Plateau: Central Texas section Central Lowland Dissected Till Plains: Eastern Lake section Osage Plains: Till Plains Western Lake section ...
The Dissected Till Plains portion of the northern plains region lies in the portion of the state north of the Missouri River, while the Osage plains portion extends into the southwestern portion of the state bordering the Ozark Plateau. Thus the northern plains covers an area slightly more than a third of the state.
The Illinois Basin is a Paleozoic depositional and structural basin in the United States, centered in and underlying most of the state of Illinois, and extending into southwestern Indiana and western Kentucky. The basin is elongate, extending approximately 400 miles (640 km) northwest-southeast, and 200 miles (320 km) southwest-northeast.
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The Permian Basin is the largest petroleum-producing basin in the United States and has produced a cumulative 28.9 billion barrels of oil and 75 trillion cubic feet of gas. In early 2020, over 4 million barrels of oil a day were being pumped from the basin. Eighty percent of estimated reserves are located at less than 10,000 feet (3,000 m) depth.