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Title: "U.S. Geological Survey open-file report ;"
Subject (Era): Is
Is Is Not
Precambrian
Subject: Is
Is Is Not
Geology

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Current results range from 1991 to 2001

1.
Precambrian basement map of the northern midcontinent, U.S.A. a digital representation of the 1990 P.K. Sims map
Author
Geological Survey (U.S.)
Published
[Reston, Va.] : The Survey ; Denver, CO : For sale by USGS Information Services (Open-File Report Sales), 2001.
Location
Library Shelving Facility (LSF) >> QE75 O63 01-21 (LC)
Format
Maps & GIS
2.
Petrographic reconnaissance of uraniferous fractures in Precambrian gneisses, Laramie River Valley, Larimer County, Colorado
Author
Hills, Francis Allan
Published
[Denver, Colo.] : U.S. Dept. of the Interior, U.S. Geological Survey, 1995.
Location
MARX Library - ask at Info Desk
Format
Books / Microforms
3.
Early Proterozoic volcanogenic sequences in central Colorado Colorado Scientific Society fall field trip, September 6-8, 1991
Author
Reed, John Calvin, 1930-
Published
Denver, Colo. : U.S. Geological Survey : [Books and Open-File Reports Section, distributor, 1991]
Location
MARX Library - ask at Info Desk
Format
Books / Microforms
4.
Elevation data for the precambrian surface in the central and southern Colorado plateau and vicinity
Author
Butler, William C.
Published
[Denver, CO] : U.S. Dept. of the Interior, U.S. Geological Survey : [Books and Open-File Reports Section, distributor], 1991.
Location
MARX Library - ask at Info Desk
Format
Books / Microforms