Ore deposits of the Butte district formed at ca. 66 to 62 Ma within a host rock of Butte Quartz Monzonite (ca. 76 Ma). Deposition of the Lowland Creek Volcanics Formation (ca. 53 to 50 Ma) on top of the Butte Quartz Monzonite and its ores, followed a period of...
Ore deposits of the Butte district formed at ca. 66 to 62 Ma within a host rock of Butte Quartz Monzonite (ca. 76 Ma). Deposition of the Lowland Creek Volcanics Formation (ca. 53 to 50 Ma) on top of the Butte Quartz Monzonite and its ores, followed a period of...
The purpose of this investigation was to test two hypotheses.
The first hypothesis interprets allochthonous rocks in the southern
Pinyon Range to lie on the Devonian Nevada Group. The second
hypothesis interprets allochthonous rocks to lie on the Mississippian
Dale Canyon Formation. Evidence presented here supports the second
hypothesis.
During...
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area, Elko and Eureka Counties, Nevada
AN ABSTRACT OF THE THESIS OF
Robert Vincent Visconti for the
Climate and terrestrial vegetation have had mutual feedbacks for nearly five hundred million years, yet both are now departing from recent historical norms, with uncertain implications for forest ecosystems. This dissertation outlines the current and potential future climate responses of lichen and bryophyte communities in the United States as part...
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Robert J. Smith for the degree of Doctor of Philosophy in Botany and Plant Pathology
presented on May 1
Paleozoic dolomites, limestones, and detrital clastic rocks
were mapped in the Bellevue Peak 15 minute quadrangle in the
southern Mahogany Hills, Nevada. Sedimentary rock units in this
area represent shallow-shelf eastern assemblage deposits.
Shallow-shelf carbonates characterized deposition from at
least Ordovician through Late Devonian time, when clastics derived
from the...
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is presented 1-16).-Lucii lb icir)s
i
Typed by Opal Grossnicklaus for Robert Allen Schalla
The thesis area consists of 42 square miles located
in Madison and Gallatin counties, Montana, in the southern
part of the Madison Range. The strata exposed in the
area range in age from Precambrian to Quaternary and have
an aggregate thickness of more than 7,600 feet.
The Paleozoic rocks, about...
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range, Madison and Gallatin counties, Montana
AN ABSTRACT OF THE THESIS OF
Robert Rowland Rose' for
