Publications
Publications from the staff of the Geology, Minerals, Energy, and Geophysics Science Center
Filter Total Items: 2542
Paleomagnetic evidence for a Late Cretaceous deformation of the Great Valley Sequence, Sacramento Valley, California Paleomagnetic evidence for a Late Cretaceous deformation of the Great Valley Sequence, Sacramento Valley, California
Paleomagnetic samples from five localities within the Great Valley sequence range in age from Late Jurassic to Late Cretaceous. All samples possess normal polarity, and alternating-field demagnetization experiments show that the remanence was acquired after the sequence was folded. A mean paleomagnetic pole position determined from 17 demagnetized samples is located at 72° N., 181° E...
Authors
Edward A. Mankinen
Lithium in the McDermitt caldera, Nevada and Oregon Lithium in the McDermitt caldera, Nevada and Oregon
Anomalously high concentrations of lithium in fluviatile-lacustrine sediments near McDermitt, Nevada, may constitute a potential resource. These sediments are associated with a caldera about 45 km in diameter that is a result of volcanic activity, subsidence and sedimentation chiefly of Miocene age. The sediments originally were vitroclastic and now consist chiefly of authigenic zeolites...
Authors
Richard K. Glanzman, J. H. McCarthy, James J. Rytuba
Preliminary geologic map of the Big Delta quadrangle, Alaska Preliminary geologic map of the Big Delta quadrangle, Alaska
No abstract available.
Authors
Florence R. Weber, H.L. Foster, T. E. Keith, Cynthia Dusel-Bacon
Ophiolitic terranes of California, Oregon, and Nevada Ophiolitic terranes of California, Oregon, and Nevada
No abstract available.
Authors
W. Porter Irwin
Review of Paleozoic rocks of the Klamath Mountains Review of Paleozoic rocks of the Klamath Mountains
No abstract available.
Authors
W. P. Irwin
Plate tectonic history of the Yolla Bolly Junction, northern California: Geological Society of America Guidebook Plate tectonic history of the Yolla Bolly Junction, northern California: Geological Society of America Guidebook
No abstract available.
Authors
M. Clark Blake, A. S. Jayko, D. L. Jones
Eocene and Oligocene planktonic Foraminifera from the upper Butano Sandstone and type San Lorenzo Formation, Santa Cruz Mountains, California Eocene and Oligocene planktonic Foraminifera from the upper Butano Sandstone and type San Lorenzo Formation, Santa Cruz Mountains, California
No abstract available.
Authors
R.Z. Poore, E. E. Brabb
Aboard the Dimitri Mendeleev—Philippine Sea ophiolites Aboard the Dimitri Mendeleev—Philippine Sea ophiolites
No abstract available.
Authors
R. G. Coleman, W. P. Irwin
Significance of Mesozoic radiolarians from the pre-Nevadan rocks of the southern Klamath Mountains, California Significance of Mesozoic radiolarians from the pre-Nevadan rocks of the southern Klamath Mountains, California
Ribbon cherts and siliceous tuffs of the North Fork and Rattlesnake Creek terranes of the Klamath Mountains yield Mesozoic radiolarians. Rocks of the North Fork terrane were previously considered to be of Paleozoic age and those of the Rattlesnake Creek to be of Paleozoic and Triassic age, on the basis of fossiliferous limestone bodies that are now considered to be exotic blocks. In both...
Authors
W. P. Irwin, D. L. Jones, E.A. Pessagno
Technique for concentrating nannoplankton from the Tertiary rocks of the California Coast and Peninsular Ranges Technique for concentrating nannoplankton from the Tertiary rocks of the California Coast and Peninsular Ranges
No abstract available.
Authors
S.W. Moore, E. E. Brabb, A. Warren