Top Qs
Timeline
Chat
Perspective

Atoka Formation

Geologic formation in the United States From Wikipedia, the free encyclopedia

Remove ads

Named after Atoka County, Oklahoma, the Atoka Formation is a geologic formation in central and western Arkansas, eastern Oklahoma, central and western Texas, and eastern New Mexico.[2] It is the surface rock of the Boston Mountains and dominates exposures in the Frontal Ouachita Mountains of the Arkansas River Valley.[2]

Quick Facts Type, Underlies ...
Remove ads

Sedimentology

The Atoka Formation is a sequence of marine sandstones, siltstones, and shales, and may be as thick at 25,000 feet in the Ouachita Mountains.[2] The formation is conformable with the Bloyd Shale in the Boston Mountains and the Johns Valley Formation in the Ouachita Mountains.[2]

Paleofauna

Conodonts

C. lauta[3]
C. sinuata[4]
G. wapanuckensis[5]
G. bella[6]
  • Hindeodella[7]
  • Ligonodina
L. lexingtonensis[8]
O. recta[9]
P. attenuata[10]
P. ouachitensis[11]
S. cancellosus[12]
S. gracilis[13]

Foraminifera

F. devexa[14]
F. oliviformis[15]
F. prolifica[16]
  • Hyperammina
H. bulbosa[17]
  • Involutina
I. semicronstrictus[18]
  • Pesudostaffella
P. atokensis[19]
  • Profusulinella
P. fittsi[20]
P. millcreekensis[21]
  • Reophax
R. fittsi[22]
R. tumidulus[23]
  • Thurramminoides
T. sphaeroidalis[24]

Trace Fossils

C. arkansanus[25]
Remove ads

References

Loading related searches...

Wikiwand - on

Seamless Wikipedia browsing. On steroids.

Remove ads