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

Geologic units in Izard county, Arkansas

[Additional scientific data in this geographic area]

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

Boone Formation (Phanerozoic | Paleozoic | Carboniferous Mississippian-Early [Meramecian Osagean]) at surface, covers 2 % of this area

Boone Formation

Lithology: limestone; chert; shale

Lafferty, St. Clair and Brassfield Limestones (Phanerozoic | Paleozoic | Silurian) at surface, covers 0.6 % of this area

Lafferty, St. Clair and Brassfield Limestones

Lithology: limestone; mudstone

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

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 8 % of this area

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

Lithology: limestone; shale; sandstone

Powell Dolomite (Phanerozoic | Paleozoic | Ordovician-Early) at surface, covers 18 % of this area

Powell Dolomite

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

St. Peter Sanstone and Everton Formation (Middle Ordovician) (Phanerozoic | Paleozoic | Ordovician-Middle) at surface, covers 66 % of this area

St. Peter Sanstone and Everton Formation (Middle Ordovician)

Lithology: sandstone; dolostone (dolomite); limestone