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Books > Earth & environment > Earth sciences > The hydrosphere > Oceanography (seas)
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The Arctic Ocean (Paperback, Softcover reprint of the original 1st ed. 1981)
Loot Price: R1,686
Discovery Miles 16 860
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The Arctic Ocean (Paperback, Softcover reprint of the original 1st ed. 1981)
Expected to ship within 10 - 15 working days
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This trip backward in time capsulizes in a general way the geologic
development of the area that is now northern Alaska. The Cretaceous
through Recent history is predominantly one of erosion of the
ancient Brooks Range and filling of the Colville Geosyncline under
processes like those in Operation today. All the rocks older than
Jurassic, however, were deposited far from their present sites. One
of the intriguing tectonic puzzles involves the geographic
positions and relative timing of events that occurred during the
orogeny that built the Brooks Range. I suggest that pre-Cretaceous
deposition took place far to the north along the western margin of
the Caledonides. Subsequently, the region that is now northern
Alaska moved southward and impinged upon a northward moving plate,
or plates, from the Pacific region. Interactions between these two
major parts of the earth's crust produced the Brooks Range during
the Jurassic. Later developments reflect continuing readjustments
of the northern third of of thrust Alaska as southward movement was
dissipated in diverse systems faulting and lateral displacement.
ACKNOWLEDGMENTS I am indebted to many colleagues who, during the
past 30 years, shared with me the excitement and pleasures of
exploring the geology of northern Alaska. Among these are W. P.
Brosge, H. N. Reiser, R. L. Detterman, A. K. Armstrong, A. L.
Bowsher, E. G. Sable, I. L. Tailleur, C. G. Mull, M. D. Mangus, A.
H. Lachenbruch, M. C. Lachenbruch, R. L. Morris, C. J.
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