Range-front structure and lithostratigraphy of the Atigun Gorge area, northcentral Brooks Range, Alaska
Thesis (M.S.) University of Alaska Fairbanks, 1991 Allochthonous sedimentary rocks of the Brooks Range orogen and overlying foredeep deposits are well exposed in the Atigun Gorge area, at the northern mountain front of the Brooks Range. A stepwise northward decrease in structural relief occurs in th...
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ftunivalaska:oai:scholarworks.alaska.edu:11122/12681 2023-05-15T15:04:40+02:00 Range-front structure and lithostratigraphy of the Atigun Gorge area, northcentral Brooks Range, Alaska Glenn, Richard K. Wallace, Wesley K. Crowder, R. Keith Mull, Charles G. 1991-12 http://hdl.handle.net/11122/12681 en_US eng http://hdl.handle.net/11122/12681 College of Natural Sciences Structural geology Stratigraphic geology Brooks Range Atigun River Gorge Master of Science Thesis ms 1991 ftunivalaska 2023-02-23T21:37:58Z Thesis (M.S.) University of Alaska Fairbanks, 1991 Allochthonous sedimentary rocks of the Brooks Range orogen and overlying foredeep deposits are well exposed in the Atigun Gorge area, at the northern mountain front of the Brooks Range. A stepwise northward decrease in structural relief occurs in this area, exposing progressively younger stratigraphic units. Present exposures reveal three structural levels: an antiformal imbricate stack and an overlying roof zone, composed of allochthonous Devonian to Cretaceous rocks, and a higher level of broad open structures in the overlying foredeep deposits. The structures of the area formed either by two distinct deformational events, involving the emplacement and subsequent deformation of the antiformal stack and overlying foredeep deposits, or by a single event, involving emplacement and simultaneous backthrusting at the base of the structurally overlying foredeep deposits. Timing of the earliest deformation is indicated by Lower Cretaceous (Neocomian) synthrust deposits. Arctic Slope Regional Corporation Thesis Arctic Brooks Range Alaska University of Alaska: ScholarWorks@UA Arctic Fairbanks |
institution |
Open Polar |
collection |
University of Alaska: ScholarWorks@UA |
op_collection_id |
ftunivalaska |
language |
English |
topic |
Structural geology Stratigraphic geology Brooks Range Atigun River Gorge Master of Science |
spellingShingle |
Structural geology Stratigraphic geology Brooks Range Atigun River Gorge Master of Science Glenn, Richard K. Range-front structure and lithostratigraphy of the Atigun Gorge area, northcentral Brooks Range, Alaska |
topic_facet |
Structural geology Stratigraphic geology Brooks Range Atigun River Gorge Master of Science |
description |
Thesis (M.S.) University of Alaska Fairbanks, 1991 Allochthonous sedimentary rocks of the Brooks Range orogen and overlying foredeep deposits are well exposed in the Atigun Gorge area, at the northern mountain front of the Brooks Range. A stepwise northward decrease in structural relief occurs in this area, exposing progressively younger stratigraphic units. Present exposures reveal three structural levels: an antiformal imbricate stack and an overlying roof zone, composed of allochthonous Devonian to Cretaceous rocks, and a higher level of broad open structures in the overlying foredeep deposits. The structures of the area formed either by two distinct deformational events, involving the emplacement and subsequent deformation of the antiformal stack and overlying foredeep deposits, or by a single event, involving emplacement and simultaneous backthrusting at the base of the structurally overlying foredeep deposits. Timing of the earliest deformation is indicated by Lower Cretaceous (Neocomian) synthrust deposits. Arctic Slope Regional Corporation |
author2 |
Wallace, Wesley K. Crowder, R. Keith Mull, Charles G. |
format |
Thesis |
author |
Glenn, Richard K. |
author_facet |
Glenn, Richard K. |
author_sort |
Glenn, Richard K. |
title |
Range-front structure and lithostratigraphy of the Atigun Gorge area, northcentral Brooks Range, Alaska |
title_short |
Range-front structure and lithostratigraphy of the Atigun Gorge area, northcentral Brooks Range, Alaska |
title_full |
Range-front structure and lithostratigraphy of the Atigun Gorge area, northcentral Brooks Range, Alaska |
title_fullStr |
Range-front structure and lithostratigraphy of the Atigun Gorge area, northcentral Brooks Range, Alaska |
title_full_unstemmed |
Range-front structure and lithostratigraphy of the Atigun Gorge area, northcentral Brooks Range, Alaska |
title_sort |
range-front structure and lithostratigraphy of the atigun gorge area, northcentral brooks range, alaska |
publishDate |
1991 |
url |
http://hdl.handle.net/11122/12681 |
geographic |
Arctic Fairbanks |
geographic_facet |
Arctic Fairbanks |
genre |
Arctic Brooks Range Alaska |
genre_facet |
Arctic Brooks Range Alaska |
op_relation |
http://hdl.handle.net/11122/12681 College of Natural Sciences |
_version_ |
1766336408231870464 |