| Missouri Mountain Shale | |
|---|---|
| Stratigraphic range: Silurian | |
| Type | Formation |
| Unit of | none |
| Sub-units | none |
| Underlies | Arkansas Novaculite |
| Overlies | Blaylock Sandstone |
| Thickness | up to 300 feet |
| Lithology | |
| Primary | Shale |
| Location | |
| Region | Arkansas, Oklahoma |
| Country | United States |
| Type section | |
| Named for | Missouri Mountains, Polk County and Montgomery County, Arkansas |
| Named by | Albert Homer Purdue |
The Missouri Mountain Shale is a Silurian geologic formation in the Ouachita Mountains of Arkansas and Oklahoma in the United States. First described in 1892, this unit was not named until 1909 by Albert Homer Purdue in his study of the Ouachita Mountains of Arkansas. Purdue assigned the Missouri Mountains in Polk and Montgomery counties, Arkansas as the type locality, but did not designate a stratotype. As of 2017, a reference section for this unit has yet to be designated.
See also
References
- McFarland, John David (2004) . "Stratigraphic summary of Arkansas" (PDF). Arkansas Geological Commission Information Circular. 36: 21. Archived from the original (PDF) on 2016-12-21. Retrieved 2018-01-09.
- ^ Purdue, A.H. (1909). Slates of Arkansas. Geological Survey of Arkansas. pp. 30, 35.
- ^ Purdue, A.H. (1909). "Structure and stratigraphy of the Ouachita Ordovician area, Arkansas (abstract)". Bulletin of the Geological Society of America. 19: 556–557.
- Griswold, L.S. (1892). "Whetstones and the novaculites". Annual Report of the Geological Survey of Arkansas for 1890. 3.
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