Johns Valley Formation

The Johns Valley Formation is a geologic formation in Arkansas and Oklahoma.[2] It preserves fossils dating back to the Carboniferous period.

Johns Valley Formation
Stratigraphic range: Carboniferous: Pennsylvanian
TypeFormation
UnderliesAtoka Formation
OverliesJackfork Sandstone
Lithology
PrimaryShale
OtherSandstone
Location
RegionArkansas and Oklahoma
CountryUnited States
Type section
Named forJohns Valley, Pushmataha County, Oklahoma [1]
Named byEdward Oscar Ulrich, 1927

Paleofauna

Bryozoans

Cephalopods
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See also

References
  1. 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.
  2. "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.
  3. 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.
  4. Gordon, Jr., Mackenzie (1964). "Carboniferous Cephalopods of Arkansas". U.S. Geological Survey Professional Paper. 460: 51–53.


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