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Publication Extents

Not all publications have extents, not all extents are completely accurate
Chromite deposits near Seiad and McGuffy Creeks, Siskiyou County, California
Francis Gerritt Wells, Clay Taylor Smith, Garn A. Rynearson, John S. Livermore
1949, Bulletin 948-B
The chromite deposits described in this report are in northcentral Siskiyou County, Calif. They are in two long tabular masses of peridotite which lie end to end and trend northnorthwest across the valley of the Klamath River. The Seiad Creek-Red Butte mass extends 10 miles north of the river and...
Structural geology of the Hawthorne and Tonopah quadrangles, Nevada
H.G. Ferguson, S. W. Muller
1949, Professional Paper 216
The area lies in west-central Nevada near the western border of the Basin and Range province. Paleozoic and Mesozoic rocks the chief subject of this report occur in isolated mountain ranges separated by stretches of Tertiary and Quaternary volcanic rocks, lacustrine deposits and alluvium. The report is concerned principally with...
The Magnet Cove Rutile Company mine, Hot Spring County, Arkansas
Douglas M. Kinney
1949, Open-File Report 50-6
The Magnet Cove Rutile Company mine was mapped by the U.S. Geological Survey in November 1944. The pits are on the northern edge of Magnet Cove and have been excavated in the oxidized zone of highly weathered and altered volcanic agglomerate. The agglomerate is composed of altered mafic igneous rocks...
Petrology and habit of some diabase sheets in southeastern Pennsylvania
Preston Enslow Holtz
1949, Open-File Report 49-33
Small masses of granophyre occur in the upper part of diabase intrusions southeastern Pennsylvania. Diamond drill hole exploration of magnetite deposits near Dillsburg revealed a body of diabase beneath the sedimentary rocks in which the deposits occur. The drill core revealed a complete gradational sequence downward from a diabase chill...