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

Geologic units in Osage county, Missouri

EMINENCE DOLOMITE, POTOSI DOLOMITE (Phanerozoic | Paleozoic | Cambrian-Furongian [Croixian]) at surface, covers < 0.1 % of this area

EMINENCE DOLOMITE - dolomite with some druse - coated chert. POTOSI DOLOMITE - dolomite with abundance of druse - coated chert.

Lithology: dolostone (dolomite); chert

SMITHVILLE DOLOMITE, POWELL DOLOMITE, COTTER DOLOMITE, JEFFERSON CITY DOLOMITE (Phanerozoic | Paleozoic | Ordovician-Early [Ibexian]) at surface, covers 53 % of this area

SMITHVILLE DOLOMITE, POWELL DOLOMITE, COTTER DOLOMITE, JEFFERSON CITY DOLOMITE - fine crystalline, silty, cherty dolomite, and oolitic chert with local sandstone beds

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

MARMATON GROUP (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Middle Desmonian]) at surface, covers < 0.1 % of this area

MARMATON GROUP - cyclic deposits, shale and limestone with sandstone, clay and several coal beds, some workable

Lithology: limestone; shale; sandstone; clay or mud; coal

PENNSYLVANIAN UNDIFFERENTIATED (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian) at surface, covers 22 % of this area

PENNSYLVANIAN UNDIFFERENTIATED

Lithology: shale; limestone; sandstone; coal

ROUBIDOUX FORMATION (Phanerozoic | Paleozoic | Ordovician-Early [Ibexian]) at surface, covers 13 % of this area

ROUBIDOUX FORMATION - sandstone, chert and interbedded dolomite

Lithology: sandstone; chert; dolostone (dolomite)

GASCONADE DOLOMITE (Phanerozoic | Paleozoic | Ordovician-Early [Ibexian]) at surface, covers 8 % of this area

GASCONADE DOLOMITE - coarse - crystalline cherty dolomite with a basal Gunter Sandstone Member.

Lithology: dolostone (dolomite); sandstone

HOLOCENE SERIES (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 4 % of this area

HOLOCENE SERIES - Alluvium - clay, silt, sand, and gravel

Lithology: clay or mud; silt; sand; gravel