2 edition of Precambrian rocks of Alaska found in the catalog.
Precambrian rocks of Alaska
G. Donald Eberlein
|Statement||by G. Donald Eberlein and Marvin A. Lanphere.|
|Series||Correlation of Precambrian rocks of the United States and Mexico, U.S. Geological Survey professional paper -- 1241-B|
|Contributions||Lanphere, Marvin A., 1933-|
|LC Classifications||USGSPPAP1241-B 1988|
|The Physical Object|
|Pagination||iii, 18 p. :|
|Number of Pages||18|
|LC Control Number||86-600211|
Western Canada during the Precambrian Laurentia extends as far west as eastern B.C. (Figure ), but the ancient rocks of the craton are almost completely covered by younger rocks in B.C., Yukon, and all of Alberta except the far northeast corner. The Precambrian rocks in the study area are part of the Precambrian Basement complex of Nigeria which is made up of the migmatite-gneiss complex, the schist belts and the granitoids. The main lithologic units in the study area include; granite-gneiss, migmatite-gneiss and banded-gneiss.
Although most of Alaska had not been assembled before the Mesozoic, the state does contain fossil-bearing rocks from the Precambrian through the Quaternary. The weakly metamorphosed Precambrian rocks in eastern Alaska contain stromatolites (Figure )—layered, mound-shaped fossils built . The Dharwar Craton, one of the parts of the Indian shield, is estimated to be 3 billion years old -- one of the oldest continental fragments in the world. This book surveys the Precambrian geology of peninsular India and, to some extent, the Himalayas. The authors discuss the similarities and differences between the crustal blocks of the shield and incorporate details concerning geochemistry.
Precambrian geology, especially of the crystalline basement rocks, is complex. Consequently, understanding what appears to be its long and involved history is a challenge. This paper not only aims to help address this challenge, but also to interpret this history within a Young Earth biblical model. An overview of North America’s Precambrian. Cambrian and Precambrian rocks of the Groom district, Nevada, southern Great Basin / by: Barnes, Harley, ,, et al. Published: () Las Animas Formation (upper Precambrian) in the subsurface of southeastern Colorado by: Tweto, Ogden, Published: ().
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B2 CORRELATION OF PRECAMBRIAN ROCKS OF THE UNITED STATES AND MEXICO OCEAN MAJOR FAULT-Dashed where Precambrian rocks of Alaska book A AREA DISCUSSED IN TEXT 0 KILOMETERS I I 1 FIGURE Distribution of Precambrian, probable Fhcambrian, and possible Precambrian rocks in Alaska.
Precambrian Rocks of Alaska [Harrison, J E (ed)] on *FREE* shipping on qualifying offers. Precambrian Rocks of AlaskaAuthor: J E (ed) Harrison. "Lithology, distribution, correlation, and isotope ages of exposed Precambrian rocks in Alaska." "Correlation chart for Precambrian rocks of Alaska" (1 folded leaf) in pocket.
Description: iii, 18 pages: illustrations ; 29 cm. Series Title: Correlation of Precambrian rocks of the United States and Mexico.; Geological Survey professional paper.
Precambrian Rocks of Alaska: Usgs Professional Paper B Paperback – Ma by Donald G. Eberlein (Author) See all formats and editions Hide other formats and editions.
Price New from Used from Paperback, Ma "Please retry" — — — Paperback Author: Donald G. Eberlein. Precambrian rocks of Alaska by G. Donald Eberlein and Marvin A.
Lanphere. The geology of Alaska includes Precambrian igneous and metamorphic rocks formed in offshore terranes and added to the western margin of North America from the Paleozoic through modern times.
The region was submerged for much of the Paleozoic and Mesozoic and formed extensive oil and gas reserves due to tectonic activity in the Arctic Ocean. Description Principles of Precambrian Geology is an update to the book, Precambrian Geology: The Dynamic Evolution of the Continental Crust, by the same author.
The new edition covers the same topics in a more concise and accessible format and is replete with. 2 PALEOZOIC AND PRECAMBRIAN ROCKS AND ALASKA'S STRUCTURAL EVOLUTION climactic orogeny during the Mesozoic includes most of I America were published in To date, however, Alaska and correlates with the Chukotka foldbelt in North- east U.S.S.R.
The younger circumpacific foldbelt of Cenozoic. These rocks are everywhere extremely folded, and in certain areas are highly metamor-phosed. Low-grade metamorphism has occurred in County Wexford, North Wales, south Pembrokeshire, and the Welsh Borders, and high-grade metamorphism has formed gneiss and migmatite in County Wexford, North Wales, south Pembrokeshire, and the Malverns.
Alaska Geology: A Long History of Massive Collisions. Some of the rock layers that make up Alaska are, frankly, unfathomably old. Indeed, material exposed at the land surface is in some places from Precambrian time, before the dinosaurs or even any land plants existed.
Interestingly, however, some cooled Alaskan lavas are literally younger than. The Precambrian spans about 88 percent of Earth history, beginning with the formation of Earth about billion years ago and ending million years ago with the diversification of life that marks the start of the Paleozoic is the least understood span of Earth's history because most Precambrian rocks are buried from view.
However, on each continent there is a "core area" of. Get this from a library. Paleontology of late Proterozoic and early Cambrian rocks of east-central Alaska. [Carol Wagner Allison] -- See journals under US Geological survey. Prof. paper In some locations, late Precambrian sills, dikes and lava flows are found.
The Sunshine Mine in the Coeur d'Alene district of Idaho, which is in correlates with the Ravalli Group. Uranium mineralized in the rock million years ago, giving a young age for limit for the surrounding rocks.
Paleozoic ( million years ago). PRECAMBRIAN ROCKS Until recently, large areas of metamorphic rocks in the central and southern parts of Alaska were con sidered to be Precambrian (Smith, ; Dutro and Payne, ).
Precambrian rocks of Alaska Professional Paper B By: G. Donald Eberlein and Marvin A. Lanphere. The Geology of Australia provides a vivid and informative account of the evolution of the Australian continent over the last million years.
Starting with the Precambrian rocks that hold clues to the origins of life and the development of an oxygenated atmosphere, it goes on to cover the warm seas, volcanism and episodes of mountain building, which formed the eastern third of the.
Precambrian rocks are often called basement rocks, since they are usually buried deep beneath the surface. They only become exposed under special circumstances where the overlying younger rocks have been stripped away.
Most exposures of these ancient rocks are found in the cores of mountain ranges or in deeply eroded canyons like the Black Canyon. Precambrian - Precambrian - Precambrian geology: By international agreement, Precambrian time is divided into the Archean Eon (occurring between roughly billion years ago and billion years ago) and Proterozoic Eon (occurring between billion and million years ago).
After the Precambrian, geologic time intervals are commonly subdivided on the basis of the fossil record. Marine conditions were widespread during the Precambrian of Alaska, although rocks of this age are rare or metamorphosed beyond recognition from their original forms.
There is some evidence of rocks that were formed on the margin of a shallow continental shelf and in deep water, as well as rocks formed in related island arcs. Purchase Precambrian Ophiolites and Related Rocks, Volume 13 - 1st Edition.
Print Book & E-Book. ISBN. Carbonate Sedimentation and Diagenesis in the Evolving Precambrian World - Precambrian carbonates are usually regarded at the simple cousins of the sedimentary realm, composed of stromatolites and dolostones, texturally not challenging and commonly altered beyond recognition by the vagaries of time, diagenesis and metamorphism.CORRELATION OF PRECAMBRIAN ROCKS OF THE UNITED STATES AND MEXICO THE PRECAMBRIAN OF THE ROCKY MOUNTAIN REGION By CARL E.
HEDGE, ROBERTS. HOUSTON1, OGDEN L. TWETO, ZELLE. PETERMAN, jACK E. HARRISON, and ROLLAND R. REID2 ABSTRACT Precambrian crystalline rocks of the Rocky Mountain region of the United States represent two age. Figure Paleozoic rocks on the west flank of the Teton Range, air oblique view west.
Ragged peaks in the foreground (Buck Mountain on the left center, Mt. Wister, with top outlined by snow patch on the extreme right), are carved in Precambrian rocks.
Banded cliffs in the background are sedimentary rocks. Alaska Basin is at upper right.