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The AAPG/Datapages Combined Publications Database
Houston Geological Society Bulletin
Abstract
Abstract: Paleozoic Tectonics History of Alaska
and the Origin of the Arctic Basin
By
Geological reasons coupled with geophysical data lead me to reject
the continental subsidence theory for the origin of the deep Canada Basin
part of the Arctic Ocean between Alaska, Siberia, and the Canadian Arctic
Archipelago. Instead, the Canada Basin is a true and probably very ancient
ocean basin floored by oceanic crust and rimmed by any early Paleozoic
geosynclinal belt. In the Upper Devonian, uplifts in this circumarctic
geosyncline accompanied by granitic intrusion produced a wedge of course
clastic sediments (exogeosyncline) that spread southward into adjoining
areas of Alaska, Canada, and Siberia. In both northern Alaska and in the
Canadian Arctic Islands thick sequences of upper Paleozoic and younger
strata were deposited unconformably on the rocks of the early Paleozoic
geosyncline, showing a similarity in tectonic history between the areas. End_of_Record - Last_Page 35--------