Journal of Geography (Chigaku Zasshi)
Online ISSN : 1884-0884
Print ISSN : 0022-135X
ISSN-L : 0022-135X
The 100s: Significant Exposures of the World (No.10)
Silurian Tropical Marine Shelf to Basin Transition at Glacier Bay National Park and Preserve
The “exotic” Alexander Terrane of Alaska
David M. ROHRRobert B. BLODGETT
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2013 Volume 122 Issue 5 Pages 905-911

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Abstract

 Glacier Bay in Alaska is one of the best places to observe Silurian strata formed at a shallow, tropical carbonate margin adjacent to a deep marine basin. The very thick Silurian represents a distinctive facies change from fossiliferous shelf limestone to basinal shale which is well exposed along the glaciated outcrops at Glacier Bay. The rocks are part of the far-travelled Alexander terrane, and many of the fossils are exotic to ancestral North America (Laurentia).

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© 2013 Tokyo Geographical Society
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