| Johns Valley Formation | |
|---|---|
| Stratigraphic range: Carboniferous: Pennsylvanian | |
| Type | Formation |
| Underlies | Atoka Formation |
| Overlies | Jackfork Sandstone |
| Lithology | |
| Primary | Shale |
| Other | Sandstone |
| Location | |
| Region | Arkansas and Oklahoma |
| Country | United States |
| Type section | |
| Named for | Johns Valley, Pushmataha County, Oklahoma [1] |
| Named by | Edward Oscar Ulrich, 1927 |
The Johns Valley Formation is a geologic formation in Arkansas and Oklahoma.[2] It preserves fossils dating back to the Carboniferous period.
Paleofauna
Bryozoans
Cephalopods
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See also
References
- ↑ Ulrich, E.O. (1927). "Fossiliferous boulders in the Ouachita "Caney" shale and the age of the shale containing them". Oklahoma Geological Survey Bulletin. 45: 6, 21–23, 30, 36–37.
- ↑ "Stratigraphic Summary of the Arkansas River Valley and Ouachita Mountains". Arkansas Geological Survey. Archived from the original on 2018-05-29. Retrieved 2017-12-15.
- 1 2 3 4 5 6 7 8 9 10 11 Horowitz, Alan S. (1977). "Late Mississippian and Early Pennsylvanian bryozoan faunas of Arkansas and Oklahoma: a review" (PDF). Oklahoma Geological Survey Guidebook. 18: 101–105. Retrieved 3 February 2018.
- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Gordon, Jr., Mackenzie (1964). "Carboniferous Cephalopods of Arkansas". U.S. Geological Survey Professional Paper. 460: 51–53.
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
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