• Source: Atoka Formation

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. It is the surface rock of the Boston Mountains and dominates exposures in the Frontal Ouachita Mountains of the Arkansas River Valley.




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. The formation is conformable with the Bloyd Shale in the Boston Mountains and the Johns Valley Formation in the Ouachita Mountains.




Paleofauna






= Conodonts

=
Cavusgnathus
C. lauta
C. sinuata
Gnathodus
G. wapanuckensis
Gondolella
G. bella
Hindeodella
Ligonodina
L. lexingtonensis
Ozarkodina
O. recta
Polygnathodella
P. attenuata
P. ouachitensis
Streptognathodus
S. cancellosus
S. gracilis




= Foraminifera

=
Fusulinella
F. devexa
F. oliviformis
F. prolifica
Hyperammina
H. bulbosa
Involutina
I. semicronstrictus
Pesudostaffella
P. atokensis
Profusulinella
P. fittsi
P. millcreekensis
Reophax
R. fittsi
R. tumidulus
Thurramminoides
T. sphaeroidalis




= Trace Fossils

=
Conostichus
C. arkansanus




References

Kata Kunci Pencarian:

• Sauroposeidon
• Atoka Formation
• Permian Basin (North America)
• Ouachita Mountains
• Winslow Formation
• Mount Magazine
• Hartshorne Formation
• Sugarloaf Mountain (Cleburne County, Arkansas)
• List of fossiliferous stratigraphic units in Oklahoma
• Bloyd Formation
• Arkoma Basin