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The Arkansas Geological Survey (AGS), formerly the Arkansas Geological Commission (AGC), is a government agency of the State of Arkansas. It is responsible for the investigation of the geology, geologic processes, and geologic resources within the state. It encourages the considered management and utilization of the state's mineral, fossil-fuel ...
Geology of Arkansas. 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 ...
Novaculite. Novaculite forms light grey flatirons in the Marathon Uplift area of Texas. [1] Novaculite, also called Arkansas Stone, is a microcrystalline to cryptocrystalline rock type that consists of silica in the form of chert or flint. It is commonly white to grey or black in color, with a specific gravity that ranges from 2.2 to 2.5.
Stanley Shale. The Stanley Shale, or Stanley Group, is a Mississippian stratigraphic unit in the Ouachita Mountains of Arkansas and Oklahoma. First described in Arkansas in 1892, [4] this unit was not named until 1902 by J.A. Taff in his study of the Ouachita Mountains of Oklahoma. [3] Taff assigned the town of Stanley in Pushmataha County ...
Arkansaurus was declared the official Arkansas state dinosaur in 2017. [6] The dinosaur was discovered in Lockesburg, Arkansas, and was a bipedal ornithomimosaur dinosaur. A near relative is the ornithomimosaur Nedcolbertia. It is named for the state of Arkansas and its discoverer Joe B. Friday, who found the dinosaur's fossilized foot on his ...
The geography of Arkansas varies widely. The state is covered by mountains, river valleys, forests, lakes, and bayous in addition to the cities of Arkansas. Hot Springs National Park features bubbling springs of hot water, formerly sought across the country for their healing properties. [1] [2] Crowley's Ridge is a geological anomaly rising ...
Wikimedia Commons has media related to Fayetteville Shale. The Fayetteville Shale is a geologic formation of Mississippian age (354–323 million years ago) composed of tight shale within the Arkoma Basin of Arkansas and Oklahoma. [4] [7] It is named for the city of Fayetteville, Arkansas, and requires hydraulic fracturing to release the ...
Womble Shale. The Womble Shale is a Middle Ordovician geologic formation in the Ouachita Mountains of Arkansas and Oklahoma. First described in 1892, [3] this unit was not named until 1909 by Albert Homer Purdue in his study of the Ouachita Mountains of Arkansas, where he named this unit as part of the upper Ouachita Shale and the Stringtown ...