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The geology of Arkansas includes deep 1.4 billion year old igneous crystalline basement rock from the Proterozoic known only from boreholes, overlain by extensive sedimentary rocks and some volcanic rocks. The region was a shallow marine, riverine and coastal environment for much of the early Paleozoic as multi-cellular life became commonplace.
Location of Arkansas in the United States. Arkansas is located in the southeastern United States, in the West South Central Census Bureau division. Arkansas covers an area of 53,179 square miles (137,733 km²) and ranks as the 29th largest state by size. [7]
A rural Ozarks scene. Phelps County, Missouri The Saint Francois Mountains, viewed here from Knob Lick Mountain, are the exposed geologic core of the Ozarks.. The Ozarks, also known as the Ozark Mountains, Ozark Highlands or Ozark Plateau, is a physiographic region in the U.S. states of Missouri, Arkansas, and Oklahoma, as well as a small area in the southeastern corner of Kansas. [1]
Crowley's Ridge (also Crowleys Ridge) is a geological formation that rises 250 to 550 feet (170 m) above the alluvial plain of the Mississippi embayment in a 150-mile (240 km) line from southeastern Missouri to the Mississippi River near Helena, Arkansas.
Arkansas (/ ˈ ɑːr k ən s ɔː / ⓘ AR-kən-saw [c]) is a landlocked state in the West South Central region of the Southern United States. [9] [10] It borders Missouri to the north, Tennessee and Mississippi to the east, Louisiana to the south, Texas to the southwest, and Oklahoma to the west.
The Little Maumelle River empties into the Arkansas River at Two Rivers Park approximately 6.6 miles (10.6 km) east of Pinnacle Mountain. The United States Board on Geographic Names once defined a mountain as any landform greater than 1,000 feet (305 m) of local relief and a hill as any landform less than 1,000 feet (305 m) of local relief.
Geology museums in Arkansas (1 P) S. Stratigraphy of Arkansas (2 C, 1 P) Pages in category "Geology of Arkansas" The following 12 pages are in this category, out of ...
The Geological Survey of Arkansas was first established in 1857, at the direction of Governor Elias Nelson Conway. David Dale Owen was the agencies first geologist. Initially, the agency received funding for only three years, which limited the agencies findings and publications, and the agency was left without funding during the Civil War.