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

Geologic units in Lawrence county, Arkansas

[Additional scientific data in this geographic area]

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

Alluvium and terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 2 % 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 < 0.1 % 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

Dune sand (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Late) at surface, covers 14 % of this area

Dune sand - Deposited mostly on terrace deposits of the second level. Younger than some terrace deposits, older than others

Lithology: dune sand

Boone Formation (Phanerozoic | Paleozoic | Carboniferous Mississippian-Early [Meramecian Osagean]) at surface, covers < 0.1 % of this area

Boone Formation

Lithology: limestone; chert; shale

Cretaceous rocks (Phanerozoic | Mesozoic | Cretaceous) at surface, covers 3 % of this area

Cretaceous rocks

Lithology: clastic; carbonate

Sand and clay (Phanerozoic | Mesozoic | Cretaceous) at surface, covers 0.4 % of this area

Sand and clay

Lithology: sand; clay or mud

Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Late) at surface, covers 29 % of this area

Terrace deposits - Alluvial deposits on one or more terrace levels

Lithology: alluvial terrace

Powell Dolomite (Phanerozoic | Paleozoic | Ordovician-Early) at surface, covers 12 % of this area

Powell Dolomite

Lithology: dolostone (dolomite); shale; sandstone; conglomerate

Alluvium - Alluvial deposits of local streams or of overbank flow of major streams (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 12 % 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

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 < 0.1 % of this area

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

Lithology: limestone; shale; sandstone

Cotter and Jefferson City Dolomites (Phanerozoic | Paleozoic | Ordovician-Early) at surface, covers 5 % of this area

Cotter and Jefferson City Dolomites

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

St. Peter Sanstone and Everton Formation (Middle Ordovician) (Phanerozoic | Paleozoic | Ordovician-Middle) at surface, covers 19 % of this area

St. Peter Sanstone and Everton Formation (Middle Ordovician)

Lithology: sandstone; dolostone (dolomite); limestone