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

Geologic units in Franklin county, Arkansas

Savanna Formation (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Late [Des Moinesian]) at surface, covers 11 % of this area

Savanna Formation

Lithology: shale; sandstone; coal

Boggy Formation (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Late [Des Moinesian]) at surface, covers < 0.1 % of this area

Boggy Formation

Lithology: shale; sandstone

Atoka Formation, undivided (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Atokan] ) at surface, covers 55 % of this area

Atoka Formation, undivided

Lithology: sandstone; shale; coal

Bloyd Shale, and Prairie Grove Member of the Hale Formation (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Morrowan]) at surface, covers 3 % of this area

Bloyd Shale, and Prairie Grove Member of the Hale Formation

Lithology: sandstone; shale; limestone; conglomerate

Atoka Formation - Middle part (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Atokan]) at surface, covers < 0.1 % of this area

Atoka Formation - Middle part

Lithology: sandstone; shale

Cane Hill Member of Hale Formation (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Early [Morrowan]) at surface, covers < 0.1 % of this area

Cane Hill Member of Hale Formation

Lithology: sandstone; siltstone; conglomerate

Alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 3 % of this area

Alluvium - Alluvial deposits of present streams

Lithology: alluvium

Atoka Formation - Lower part (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Atokan]) at surface, covers < 0.1 % of this area

Atoka Formation - Lower part

Lithology: sandstone; shale

Atoka Formation - Upper part (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Atokan]) at surface, covers 0.4 % of this area

Atoka Formation - Upper part

Lithology: sandstone; shale

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

McAlester Formation (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Des Moinesian]) at surface, covers 10 % of this area

McAlester Formation

Lithology: shale; sandstone; coal

Harthshorne Sandstone (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Des Moinesian]) at surface, covers 14 % of this area

Harthshorne Sandstone

Lithology: sandstone; shale; coal