Publications
Filter Total Items: 2686
Geologic terranes of coastal northern California and southern Oregon
No abstract available.
Authors
A. S. Jayko, M. Clark Blake
Correlation of early Cretaceous blueschists in Washington, Oregon and northern California
The protolith and metamorphic histories of Early Cretaceous blueschists that occur in Washington, Oregon, and California are remarkably similar. These blueschists are the Shuksan metamorphic suite of northwestern Washington, the Condrey Mountain schist of northern California and southern Oregon, and the Pickett Peak terrane of northern California and southwestern Oregon. We suggest that these bodi
Authors
E. H. Brown, M. C. Blake
Geochemistry and tectonic setting of some volcanic rocks of the Franklinian assemblage, central and eastern Brooks Range
No abstract available.
Authors
Thomas E. Moore
Unconformity between Coast Range ophiolite and part of the lower Great Valley sequence, South Fork of Elder Creek, Tehama County, California
The South Fork of Elder Creek is located on private property about 6 mi (10 km) northwest of Paskenta, Calif. (Fig. 1). To visit this locality it is necessary to call Mr. Les Sutfin (916-824-4628) and arrange to pick up the key to the gate at his home in Corning. From the Paskenta Store, drive 3.3 mi (5.3 km) north on the Toomes Camp road to the locked gate on the north side of the road. From here
Authors
M. C. Blake, Jr., A. S. Jayko, D. L. Jones, B. W. Rogers
Petrology and K-Ar ages of the Misheguk igneous sequence, an allochthonous mafic and ultramafic complex, and its metamorphic aureole, western Brooks Range, Alaska
No abstract available.
Authors
J.M. Boak, D. L. Turner, D.J. Henry, Thomas E. Moore, W. K. Wallace
Dinosaurs, pollen and spores, and the age of the Ojo Alamo Sandstone, San Juan Basin, New Mexico
The Ojo Alamo Sandstone of the San Juan Basin of New Mexico is composed of interbedded conglomeratic sandstone, sandstone, siltstone, and mudstone. Conglomerates are found in the western part of the basin; siliceous pebbles diminish in size both southward and eastward across the basin, becoming rare to nonexistent in the eastern part. There is great variation in the internal stratigraphy of the Oj
Authors
James E. Fassett, S. G. Lucas, F.M. O'Neill
The ages of the continental, Upper Cretaceous, Fruitland Formation and Kirtland Shale based on a projection of ammonite zones from the Lewis Shale, San Juan Basin, New Mexico and Colorado
The Kirtland Shale or Fruitland Formation directly underlies the Cretaceous-Tertiary boundary throughout most of the San Juan Basin of northwest New Mexico and southwest Colorado. These formations have been known to be Late Cretaceous in age since the early 1900s. Now, with the greatly renewed interest in rocks adjacent to mass extinction boundaries, it is important to place more precise ages on s
Authors
James E. Fassett
World resources of crude oil, natural gas, natural bitumen, and shale oil
No abstract available.
Authors
C.D. Masters, Emil D. Attanasi, William D. Dietzman, R. F. Meyer, R.W. Mitchell, D. H. Root
Resource assessments, geologic deposit models, and offshore minerals with an example of heavy-mineral sands
A resource assessment method for offshore minerals based on descriptive and grade-tonnage models is proposed. Historical development and applications of this method are summarized. Based on this approach, descriptive and quantitative deposit models for strand-line titanium placer deposits have been developed. Descriptive statistics were also computed using the worldwide deposit data set upon which
Authors
Emil D. Attanasi, J. H. DeYoung, E. R. Force, Andrew Grosz
New estimates of displacement along the San Andreas fault in central California based on paleobathymetry and paleogeography
Studies of depth-related benthic foraminiferal biofacies permit the construction of paleobathymetric maps of the La Honda and San Joaquin basins of central California. These maps support the hypothesis that the La Honda and San Joaquin basins were contiguous during the late Oligocene and early Miocene and subsequently were separated by about 320–330 km of right-lateral displacement on the San Andr
Authors
Richard G. Stanley
Geologic map of the Redding 1 x 2 degree quadrangle, Shasta, Tehama, Humboldt, and Trinity Counties, California
No abstract available.
Authors
Luis A. Fraticelli, J. P. Albers, W. P. Irwin, M. C. Blake