USGS - science for a changing world

Mineral Resources On-Line Spatial Data

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

Geologic units in Goodhue county, Minnesota

Upper and Middle Ordovician rocks, undivided (Late and Middle Ordovician) at surface, covers 14 % of this area
Upper and Middle Ordovician rocks, undivided - Limestone and shaly limestone of the Maquoketa and Dubuque Formations, and limestone and dolostone of the Galena Group in the Hollandale embayment of southeastern Minnesota
Lithology: limestone; dolostone (dolomite)
Decorah Shale (Middle Ordovician) (Middle Ordovician) at surface, covers 5 % of this area
Decorah Shale (Middle Ordovician) - Light-greenish-gray shale and lesser amounts of coquinoid limestone, especially in the upper half of the formation. Mapped as a separate unit where possible.
Lithology: shale; limestone
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
Lower Ordovician rocks, undivided (Lower Ordovician) at surface, covers 3 % 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
Upper Cambrian, undivided (Late Cambrian) at surface, covers < 0.1 % 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

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://mrdata.usgs.gov/geology/state/fips-unit.php?code=f27049
Page Contact Information: pschweitzer@usgs.gov
Page Last modified: 13:39 on 25-Apr-2014