Search results
Results from the WOW.Com Content Network
List of fossiliferous stratigraphic units in Arkansas. Add languages ... This article contains a list of fossil-bearing stratigraphic units in the state of Arkansas ...
List of fossiliferous stratigraphic units in Arkansas This page was last edited on 30 November 2014, at 05:58 (UTC). Text is available under the Creative Commons ...
At the time of the Cambrian explosion, as multi-cellular became commonplace, Arkansas was primarily flooded by rivers and a shallow marine environment.In the Ozark region, calcareous, quartzose sand and clay deposited, while the Ouachita area witnessed the formation of alternating layers of sand, clay, silt and small amounts of lime mud.
The Smackover Formation is a geologic formation that extends under parts of Arkansas, Louisiana, Texas, Alabama, Mississippi, and Florida. [1] It preserves fossils dating back to the Jurassic period. The formation is a relic of an ancient sea that left an extensive, porous, and permeable limestone geologic unit.
Johns Valley Formation; Stratigraphic range: Carboniferous: Pennsylvanian: Type: Formation: Underlies: Atoka Formation: Overlies: Jackfork Sandstone: Lithology ...
This page was last edited on 19 February 2023, at 19:20 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
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 natural gas contained within.
White Bluff, along the Arkansas River The White Bluff Formation is a marl, sand, and clay geologic formation in Arkansas that is part of the Jackson Group . It preserves fossils dating back to the Paleogene period , specifically the Eocene .