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
gollark: I believe it can be relatively fast if you keep recent information of where all the satellites are cached or something.
gollark: Relatedly, apparently GPS can reach sub-metre accuracy now, which is very impressive.
gollark: You would have to detect and correct for it.
gollark: Weird turbulence stuff could happen though?
gollark: I figure that with good acceleration/rotation data, knowledge of initial velocity and stuff (GPS should work when it's out of the atmosphere, right?), and rough knowledge of what the trajectory is you could get it to somewhat work.

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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