USGS Home
Contact USGS
Search USGS

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

Geologic units in Scott county, Minnesota

Upper Cambrian, undivided (Late Cambrian) at surface, covers 57 % of this area

Upper Cambrian, undivided - Jordan Sandstone; dolomite, glauconite, and silty glauconite rocks of the St. Lawerence and Franconia Formation; Ironton and Galesville Sandstones; sandy and shaly rocks of the Eau Claire Formation; and the Mt. Simon Sandstone.

Lithology: dolostone (dolomite); sandstone; shale

Lower Ordovician rocks, undivided (Lower Ordovician) at surface, covers 41 % of this area

Lower Ordovician rocks, undivided - Shakopee and Oneota Formations of the Prairie du Chien Group in the Hollandale embayment of southeastern Minnesota. Unit consists dominantly of dolostone and dolomitic limestone. The Shakopee also contains intervals of quartz arenite, including a pronounced basal unit named the New Richmond Member

Lithology: dolostone (dolomite); limestone; sandstone

Solor Church Formation (Middle Proterozoic) at surface, covers 0.9 % of this area

Solor Church Formation - Dark-red to dark-brown shale, siltstone, and lithic sandstone of fluvial origin in Scott and Carver Counties; metamorphosed to zeolite facies

Lithology: shale; siltstone; sandstone

Middle Ordovician rocks, undivided (Middle Ordovician) at surface, covers 1 % of this area

Middle Ordovician rocks, undivided - Decorah Shale; limestone of the Platteville Formation; shaly rocks of the Glenwood Formation; and St. Peter Sandstone in the Hollandale embayment of southeastern Minnesota

Lithology: sandstone; limestone; shale