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Glacier Island, Prince William Sound, Alaska. 1964.

Tectonic Uplift and Subsidence

Dates

Date Taken
1964

Summary

Alaska Earthquake March 27, 1964. The amount of tectonic uplift on Glacier Island in Prince William Sound was shown by the upper limit to which algae of the intertidal zone grew on this on this sea cliff before and after the earthquake. The top of the band of green (still living) algae is near present (post- earthquake) mean high tide. The top of the band of brown (desiccated) algae marks the approximate position of mean high tide before the earthquake. The difference in height between the top of the bands of living and of desiccated algae (3 feet) is a measure of the amount of tectonic uplift in this area.

Contacts

Data Owner :
U.S. Geological Survey

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aeq00006.jpg thumbnail 3.32 MB image/jpeg

Material Request Instructions

Item located in U.S.Geological Survey Photographic Collection, in "Alaska Earthquakes slide Collection", March 27, 1964 earthquake, no. 6ct.

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This USGS product is considered to be in the U.S. public domain. For further information on the USGS Information Policies and Instructions, refer to the Copyrights and Credits section on this web page: http://www.usgs.gov/laws/info_policies.html
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Additional Information

Identifiers

Type Scheme Key
name photoLibrary aeq00006
number photoLibrary 33
batch photoLibrary batch07
number_in_book photoLibrary 6ct

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