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Year Published: 1971

Stratigraphy and paleontology of the revised type section for the Tahkandit Limestone (Permian) in east-central Alaska

Brabb, Earl E.; Grant, Richard E.
Stratigraphy and paleontology of the revised type section for the Tahkandit Limestone (Permian) in east-central Alaska; 1971; PP; 703; Brabb, Earl E.; Grant, Richard E.

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Year Published: 1971

Impact breccias in carbonate rocks, Sierra Madera, Texas

Two main types of deformational breccia occur in the Sierra Madera cryptoexplosion structure: monolithologic breccias composed of shattered rock of a single lithology and mixed breccias composed of rocks of several lithologies. Monolithologic breccias generally show no mineralogic signs of shock deformation, but a few samples are shatter-coned in...

Wilshire, H.G.; Howard, Keith A.; Offield, T.W.

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Year Published: 1971

Paleozoic metasediments in the northern Ruby Mountains, Nevada

New evidence indicates that high-grade regionally metamorphosed marble and quartzite in the northern Ruby Mountains are Paleozoic strata. Correlation is based on a match of the lithologic sequence to strata of Cambrian to Devonian age in nearby areas; particularly diagnostic is a brown dolomite at the base of the Cambrian carbonate sequence. The...

Howard, Keith A.

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Year Published: 1971

Structural implications of an offset Early Cretaceous shoreline in northern California

Recognition of a nonmarine to marine transition in sedimentary rocks at Glade Creek and Big Bar in the southern Klamath Mountains permits reconstruction of the approximate position of a north-trending Early Cretaceous (Valanginian) shoreline. At the southern end of the Klamath Mountains, the shoreline is displaced 60 mi or more to the east by a...

Jones, D.L.; Irwin, W.P.

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Year Published: 1971

The earthquake sequence near Danville, California, 1970

Several thousand small earthquakes, with magnitudes ranging up to 4, occurred near Danville, California, during May, June, and July 1970. Seven temporary seismographs were installed near the epicentral region to augment an existing telemetered network within 1 day after the first felt earthquake. The dense concentration of 10 seismographs within...

Lee, W.H.K.; Eaton, M.S.; Brabb, E.E.

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Year Published: 1970

Geologic interpretation of reconnaissance aeromagnetic survey of northeastern Alaska

Aeromagnetic reconnaissance of northeastern Alaska in 1965 covered approximately 100,000 square miles, from lat 64° N. to the Arctic Ocean and from the Alaska-Yukon boundary to long 148°30' W. A magnetic contour map was compiled from data from the 1965 survey and earlier surveys. On the basis of these data, northeastern Alaska may be divided into...

Brosge, William Peters; Brabb, Earl E.; King, Elizabeth R.

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Year Published: 1970

Geologic map of White Pine County, Nevada

Hose, Richard K.; Blake, M. Clark
Geologic map of White Pine County, Nevada; 1970; OFR; 70-166; Hose, Richard K.; Blake, M. Clark, Jr.

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Year Published: 1970

Mineral resources of the Agua Tibia Primitive Area, California

Irwin, William P.; Greene, Robert C.; Thurber, Horace K.
Mineral resources of the Agua Tibia Primitive Area, California; 1970; B; 1319-A; Irwin, William P.; Greene, Robert C.; Thurber, Horace K.

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Year Published: 1970

Preliminary geologic map of the Black River quadrangle, east-central Alaska

Brabb, E. E.
Preliminary geologic map of the Black River quadrangle, east-central Alaska; 1970; I; 601; compiled by Brabb, E. E.

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Year Published: 1970

Preliminary geologic map of the central Santa Cruz mountains, California

Brabb, E. E.
Preliminary geologic map of the central Santa Cruz mountains, California; 1970; OFR; 70-36; Compiled by Brabb, E. E.