The Cason Shale is a Late Ordovician to Middle Silurian geologic formation in the Ozark Plateaus of Arkansas.[1] The name was introduced in 1894 by Henry Shaler Williams in his study of Arkansas.[2] Williams designated a type locality at what was known as the Cason tract and mine, near Batesville, Independence County, Arkansas, however, he did not assign a stratotype. As of 2017, a reference section has not been designated for this unit.
| Cason Shale | |
|---|---|
| Stratigraphic range: Ordovician-Silurian | |
| Type | Formation |
| Unit of | none |
| Underlies | Brassfield Limestone |
| Overlies | Fernvale Limestone |
| Thickness | up to appx. 23 feet[1] |
| Lithology | |
| Primary | Shale |
| Location | |
| Region | Arkansas |
| Country | United States |
| Type section | |
| Named for | Cason tract and mine, near Batesville, Independence County, Arkansas |
| Named by | Henry Shaler Williams[2] |
Paleofauna
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References
edit- ^ a b McFarland, John David (2004) [1998]. "Stratigraphic summary of Arkansas" (PDF). Arkansas Geological Commission Information Circular. 36: 7. Archived from the original (PDF) on 2016-12-21. Retrieved 2018-01-11.
- ^ a b Williams, Henry S. (1894). "On the age of the manganese beds of the Batesville region of Arkansas". The American Journal of Science. 3rd Series. 48: 325–331.
- ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar as at au av aw ax Craig, William (1968). The stratigraphy and conodont paleontology of Ordovician and Silurian strata, Batesville district, Independence and Izard counties, Arkansas (PhD). The University of Texas.
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