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This page was last edited on 18 November 2024, at 07:48 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
The middle shale fraction has a high TOC level, as a result it is one of the most significant geologic units in the Appalachian Basin petroleum chains. Geochemical analyses of the shale show that the TOC level varies dramatically, and the middle part of the shale has typically the highest organics.
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 ...
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.
This page was last edited on 18 January 2025, at 19:02 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
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.
The Imo Formation, or Imo Shale, is a geologic unit in northern Arkansas that dates to the Chesterian Series of the late Mississippian.The Imo is considered to be a member of the upper Pitkin Formation, and is the most recent Mississippian age rock in Arkansas.
The Witts Springs Formation is a sandstone geologic formation in Arkansas with thin layers of limestone, shale, and siltstone. It preserves fossils dating back to the Carboniferous period . Paleontology