Skip to Main Content
Skip Nav Destination

Contact metamorphism in Santa Rosa Range, Nevada

Robert Ross Compton
Contact metamorphism in Santa Rosa Range, Nevada
Bulletin of the Geological Society of America (1960) 71 (9): 1383-1416


The metamorphic rocks of the Santa Rosa Range of N.-central Nevada represent a sequence of Upper Triassic (and Jurassic?) sediments that was 20,000 ft. thick before it was strongly folded, metamorphosed, locally faulted, and intruded by granitic stocks. Each of the 6 formations is dominantly metapelitic, although quartzitic, calcareous, and dolomitic rocks are widespread. All the rocks were converted to metamorphic assemblages of quartz, albite, muscovite, chlorite, and carbonates before and during the regional folding. The 9 stocks consist mainly of sodic granodiorite, but adamellite, trondhjemite, and tonalite are locally abundant. Early chilled apophyses show the magmas originally contained few if any crystals, and structural relationships prove the stocks are dominantly cross-cutting (stoped?) bodies. This study emphasizes the influence of magmatic water on contact-metamorphic reactions; the relationships suggest that the rapid rate of heating by intrusive magma may be the most significant characteristic of contact, as compared to regional metamorphism.

ISSN: 1050-9747
Serial Title: Bulletin of the Geological Society of America
Serial Volume: 71
Serial Issue: 9
Title: Contact metamorphism in Santa Rosa Range, Nevada
Pages: 1383-1416
Published: 1960
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
Accession Number: 1960-007728
Categories: Igneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: incl. sketch map, diagrams, sections, and tables, also geol. map and sections and illus.
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States
Update Code: 1960
Close Modal

or Create an Account

Close Modal
Close Modal