Rock-stratigraphic nomenclature, lithology, and subcrop area of the Galena-Platteville bedrock unit in Illinois and Wisconsin / U.S. Department of the Interior, U.S. Geological Survey ; by W.G. Batten ... [et al.] ; prepared in cooperation with the United States Environmental Protection Agency.

[Reston, Va.?] : The Survey, [1997?]

1 map ; 111 x 87 cm. on sheet 122 x 91 cm., folded in envelope 32 x 24 cm.

Scale 1:500,000 ; Albers conic equal-area proj. (W 91⁰--W 89⁰/N 45⁰--N 42⁰).

Rock stratigraphic nomenclature, lithology, and subcrop area of the Galena-Platteville bedrock unit in Illinois and Wisconsin

English

June 01, 2002