Figure
3. Interpretive map showing the surficial geology of the lower beach face, inner
shelf, and middle shelf of the Columbia River littoral cell. The 'Surficial geology' is
ordered by relative age with 'Jetty' being the youngest and 'Outcrop' being the oldest.
'Sand dollars' are separate as they are of biological origin. Click on the
figure to view a larger scale image.
U.S. Department of the Interior, U.S. Geological Survey
URL: http://pubs.usgs.gov/of/2000/of00-167/htmldocs/figure3.htm
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Last modified: 10:24:14 Tue 18 Sep 2001
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Figure
3. Interpretive map showing the surficial geology of the lower beach face, inner
shelf, and middle shelf of the Columbia River littoral cell. The 'Surficial geology' is
ordered by relative age with 'Jetty' being the youngest and 'Outcrop' being the oldest.
'Sand dollars' are separate as they are of biological origin. Click on the
figure to view a larger scale image.