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Mineral Resources > Online Spatial Data > Geology > by state > Arkansas Geology

Geologic units in Perry county, Arkansas

Atoka Formation - Middle part (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Atokan]) at surface, covers 8 % of this area

Atoka Formation - Middle part

Lithology: sandstone; shale

Harthshorne Sandstone (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Des Moinesian]) at surface, covers 2 % of this area

Harthshorne Sandstone

Lithology: sandstone; shale; coal

McAlester Formation (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Des Moinesian]) at surface, covers 1 % of this area

McAlester Formation

Lithology: shale; sandstone; coal

Stanley Shale (Phanerozoic | Paleozoic | Carboniferous Mississippian-Early) at surface, covers 2 % of this area

Stanley Shale - Includes Chickasaw Creek Chert equivalent of Harlton (1938) near top and Hatton Tuff Lentil and Hot Springs Sandstone Member near base

Lithology: shale; sandstone; siltstone; chert; tuff

Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Late) at surface, covers 2 % of this area

Terrace deposits - Alluvial deposits on one or more terrace levels

Lithology: alluvial terrace

Atoka Formation - Upper part (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Atokan]) at surface, covers 7 % of this area

Atoka Formation - Upper part

Lithology: sandstone; shale

Johns Valley Shale (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Early [Morrowan]) at surface, covers 4 % of this area

Johns Valley Shale

Lithology: shale; sandstone; limestone

Atoka Formation - Lower part (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Atokan]) at surface, covers 43 % of this area

Atoka Formation - Lower part

Lithology: sandstone; shale

Alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 12 % of this area

Alluvium - Alluvial deposits of present streams

Lithology: alluvium

Jackfork Sandstone (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Early [Morrowan]) at surface, covers 17 % of this area

Jackfork Sandstone

Lithology: sandstone; shale