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Geologic Studies on Sitkinak Island, Alaska
Geologic Studies on Sitkinak Island, Alaska
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Title: Geologic Studies on Sitkinak Island, Alaska


A tidal marsh bank exposed during low tide on Sitkinak Island, Alaska. The bank reveals ledges of alternating peat and silt. Abrupt uplift and subsidence during large megathrust earthquakes is interpreted to be the cause of the alternating layers.

Location: Sitkinak Island, AK, USA

Date Taken: 7/2011

Photographer: Rich Briggs
Photographer Email:
Photographer Organization: USGS

Usage: This image is public domain/of free use unless otherwise stated. Please refer to the USGS Copyright section for how to credit the photo.


File Details:
Type: JPEG image - 1.54 MB
Dimensions: 1600 x 1200

Suggest an update to the information/tags?

Tags: AGU Alaska Earthquakes GeologicHazards NR2014_03_26



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