| Blaylock Sandstone | |
|---|---|
| Stratigraphic range: Silurian | |
| Type | Formation |
| Unit of | none |
| Sub-units | none |
| Underlies | Missouri Mountain Shale |
| Overlies | Polk Creek Shale |
| Thickness | up to 1200 feet |
| Lithology | |
| Primary | Sandstone |
| Location | |
| Region | Arkansas, Oklahoma |
| Country | United States |
| Type section | |
| Named for | Blaylock Mountain, Montgomery County, Arkansas |
| Named by | Albert Homer Purdue |
The Blaylock Sandstone is a Silurian geologic formation in the Ouachita Mountains of Arkansas and Oklahoma. 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 Blaylock Mountain in Montgomery County, 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.
Paleofauna
Graptolites
- D. decussatus
- G. perlatus
- M. argutus
- M. distans
- M. gregarius
See also
References
- McFarland, John David (2004) . "Stratigraphic summary of Arkansas" (PDF). Arkansas Geological Commission Information Circular. 36: 20–21. 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.
- ^ Miser, Hugh D.; Purdue, A.H. (1929). "Geology of the De Queen and Caddo Gap quadrangles, Arkansas". U.S. Geological Survey Bulletin. 808: 45.
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