Geologic units in Pope county, Arkansas

Bloyd Shale, and Prairie Grove Member of the Hale Formation (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Morrowan]) at surface, covers 24 % of this area: Bloyd Shale, and Prairie Grove Member of the Hale Formation
Lithology: sandstone; shale; limestone; conglomerate
Atoka Formation, undivided (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Atokan] ) at surface, covers 46 % of this area: Atoka Formation, undivided
Lithology: sandstone; shale; coal
Atoka Formation - Upper part (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Atokan]) at surface, covers 9 % of this area: Atoka Formation - Upper part
Lithology: sandstone; shale
McAlester Formation (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Des Moinesian]) at surface, covers 2 % of this area: McAlester Formation
Lithology: shale; sandstone; coal
Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Late) at surface, covers 3 % of this area: Terrace deposits - Alluvial deposits on one or more terrace levels
Lithology: alluvial terrace
Harthshorne Sandstone (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Des Moinesian]) at surface, covers 8 % of this area: Harthshorne Sandstone
Lithology: sandstone; shale; coal
Alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 6 % of this area: Alluvium - Alluvial deposits of present streams
Lithology: alluvium