Tectonic imbrication and foredeep development in the Penokean orogen, east-central Minnesota--an interpretation based on regional geophysics and the results of test-drilling /

by Southwick, D. L. (David Leroy), 1936-
Published 1991

Geologic map of Minnesota : International Falls sheet : bedrock geology /

by Southwick, D. L. (David Leroy), 1936-
Published 1979

Tectonic imbrication and foredeep development in the Penokean orogen, east-central Minnesota--an interpretation based on regional geophysics and the results of test-drilling /

by Southwick, D. L. (David Leroy), 1936-, Morey, G. B.
Published 1991

The Chopawamsic Formation-- : a new stratigraphic unit in the Piedmont of northeastern Virginia /

by Southwick, D. L. (David Leroy), 1936-, Mixon, Robert B., Reed, John Calvin, Jr., 1930-
Published 1971

Geologic map of the Soudan quadrangle, St. Louis County, Minnesota /

by Sims, P. K. (Paul Kibler), 1918-2011
Published 1980

Geologic map of Archean rocks, western Vermilion district, northern Minnesota /

Published 1985

Geologic map of the Quantico quadrangle, Prince William and Stafford Counties, Virginia, and Charles County, Maryland /

Published 1972