Atoka Formation

Atoka Formation
Stratigraphic range: Pennsylvanian
TypeGeologic formation
UnderliesHartshorne Sandstone
OverliesBloyd Formation, Johns Valley Formation
Lithology
PrimarySandstone
OtherShale
Location
RegionArkansas, Oklahoma
CountryUnited States
Type section
Named byJ.A. Taff

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.

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