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

Geologic units in Independence county, Arkansas

Alluvium - Alluvial deposits of local streams or of overbank flow of major streams (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 10 % of this area

Alluvial deposits of local streams or of overbank flow of major streams - In some areas includes deposits in abandoned meanders of major streams

Lithology: alluvium

Bloyd Shale, and Prairie Grove Member of the Hale Formation (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Morrowan]) at surface, covers 7 % of this area

Bloyd Shale, and Prairie Grove Member of the Hale Formation

Lithology: sandstone; shale; limestone; conglomerate

Cason Shale and Fernvale Limestone (Upper Ordovician) and Kimmswick Limestone, Plattin Limestone, and Joachim Dolomite (Middle Ordovician) (Phanerozoic | Paleozoic | Ordovician-Middle Ordovician-Late) at surface, covers 9 % of this area

Cason Shale and Fernvale Limestone (Upper Ordovician) and Kimmswick Limestone, Plattin Limestone, and Joachim Dolomite (Middle Ordovician)

Lithology: limestone; shale; sandstone

Pitkin Limestone, Fayetteville Shale (including the Wedington Sandstone member), and Batesville Sandstone (including the Hindsville Limestone Member) (Phanerozoic | Paleozoic | Carboniferous Mississippian-Late [Chesterian]) at surface, covers 12 % of this area

Pitkin Limestone, Fayetteville Shale (including the Wedington Sandstone member), and Batesville Sandstone (including the Hindsville Limestone Member)

Lithology: sandstone; shale; limestone

Cane Hill Member of Hale Formation (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Early [Morrowan]) at surface, covers 13 % of this area

Cane Hill Member of Hale Formation

Lithology: sandstone; siltstone; conglomerate

St. Peter Sanstone and Everton Formation (Middle Ordovician) (Phanerozoic | Paleozoic | Ordovician-Middle) at surface, covers 5 % of this area

St. Peter Sanstone and Everton Formation (Middle Ordovician)

Lithology: sandstone; dolostone (dolomite); limestone

Gravel (Phanerozoic | Cenozoic | Tertiary) at surface, covers 1 % of this area

Gravel - Gravel on isolated hills within 40 miles (64km) of the Mississippi Embayment. Many small deposits to the west not shown

Lithology: gravel

Ruddell Shale (Phanerozoic | Paleozoic | Carboniferous Mississippian-Late [Chesterian]) at surface, covers 3 % of this area

Ruddell Shale

Lithology: shale

Alluvium and terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 6 % of this area

Alluvium and terrace deposits - Alluvial deposits of present streams and on one or more terrace levels

Lithology: alluvium; alluvial terrace

Chattanooga Shale (Lower Mississippian and Upper Devonian), Clifty Limestone (Middle Devonian), and Penters Chert (Lower Devonian) (Phanerozoic | Paleozoic | Devonian-Early Devonian-Middle(?) Devonian-Late(?) Carboniferous Mississippian-Early) at surface, covers 3 % of this area

Chattanooga Shale (Lower Mississippian and Upper Devonian), Clifty Limestone (Middle Devonian), and Penters Chert (Lower Devonian)

Lithology: shale; limestone; dolostone (dolomite); sandstone; siltstone; chert

Alluvium - Alluvial deposits in major stream channels or in mappable meanders of major streams (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 5 % of this area

Alluvial deposits in major stream channels or in mappable meanders of major streams - Includes alluvial deposits in natural levees in some areas.

Lithology: alluvium

Boone Formation (Phanerozoic | Paleozoic | Carboniferous Mississippian-Early [Meramecian Osagean]) at surface, covers 11 % of this area

Boone Formation

Lithology: limestone; chert; shale

Cretaceous rocks (Phanerozoic | Mesozoic | Cretaceous) at surface, covers 4 % of this area

Cretaceous rocks

Lithology: clastic; carbonate

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

Lafferty, St. Clair and Brassfield Limestones (Phanerozoic | Paleozoic | Silurian) at surface, covers 0.5 % of this area

Lafferty, St. Clair and Brassfield Limestones

Lithology: limestone; mudstone

Moorefield Formation (Phanerozoic | Paleozoic | Carboniferous Mississippian-Late [Meramecian]) at surface, covers 6 % of this area

Moorefield Formation

Lithology: shale; limestone