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General geology of the Harold D. Roberts Tunnel, Colorado

Author: Charles Sherwood Robinson; Lawrence Allen Warner; Ernest E Wahlstrom; Geological Survey (U.S.),
Publisher: Washington : U.S. Govt. Print. Off., 1974.
Series: Geological Survey professional paper, 831-B.; Engineering geology of the Harold D. Roberts Tunnel, Colorado.
Edition/Format:   Print book : National government publication : EnglishView all editions and formats
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Material Type: Government publication, National government publication
Document Type: Book
All Authors / Contributors: Charles Sherwood Robinson; Lawrence Allen Warner; Ernest E Wahlstrom; Geological Survey (U.S.),
OCLC Number: 1255920
Description: iv, 48 pages : illustrations (1 folded in pocket) ; 28 cm.
Contents: Abstract --
Introduction --
Summary of general geology --
Precambrian rocks --
Metasedimentary rocks --
Amphibolite and related rocks --
Migmatite --
Microcline gneiss --
Biotite gneiss and schist --
Amphibolite --
Sillimanitic biotite gneiss and schist --
Hornblende gneiss --
Igneous rocks --
Boulder Creek Granite --
Silver Plume Granite --
Pegmatite and aplite --
Relative age and origin of the Precambrian rocks --
Metasedimentary rocks --
Granite --
Paleozoic and Mesozoic sedimentary rocks --
Maroon and Lykins Formations --
Entrada Sandstone --
Morrison Formation --
Dakota Group --
Benton Shale --
Niobrara Formation --
Pierre Shale --
Tertiary igneous rocks --
Montezuma Quartz Monzonite and associated aplitic rock --
Quartz monzonite --
Aplitic rock --
Dikes --
Augite and hornblende diorite --
Latite porphyry --
Rhyolite porphyry --
Age --
Surficial deposits --
Structure --
Precambrian structural features --
Folds --
Faults --
Frey Gulch shear zone --
Montezuma shear zone --
East Portal shear zone --
Igneous rocks --
Laramide structural features --
Folds --
Faults --
Joints --
Veins and wallrock alteration --
Summary of structural geology --
References cited --
Index.
Series Title: Geological Survey professional paper, 831-B.; Engineering geology of the Harold D. Roberts Tunnel, Colorado.
Responsibility: by Charles S. Robinson, Lawrence A. Warner, and Ernest E. Wahlstrom.

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