Johns Valley Formation

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

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

  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.