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Sediment delivery to the Gulf of Alaska: source mechanisms along a glaciated transform margin

Geological Society Special Publication
By: , and 

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Abstract

Sediment delivery to the Gulf of Alaska occurs via four areally extensive deep-water fans, sourced from grounded tidewater glaciers. During periods of climatic cooling, glaciers cross a narrow shelf and discharge sediment down the continental slope. Because the coastal terrain is dominated by fjords and a narrow, high-relief Pacific watershed, deposition is dominated by channellized point-source fan accumulations, the volumes of which are primarily a function of climate. The sediment distribution is modified by a long-term tectonic translation of the Pacific plate to the north along the transform margin. As a result, the deep-water fans are gradually moved away from the climatically controlled point sources. Sets of abandoned channels record the effect of translation during the Plio-Pleistocene.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Sediment delivery to the Gulf of Alaska: source mechanisms along a glaciated transform margin
Series title Geological Society Special Publication
Issue 129
Year Published 1998
Language English
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Geological Society Special Publication
First page 43
Last page 66