This view is looking into a large collapse structure associated with the lava tube system in the El Calderon volcanic area. This 80 foot-deep hole is the eastern pit of the Double Sinks along the El Caderon Area trail.
The URL of this page is: http://3dparks.wr.usgs.gov/2006/el_malpais/html/elma0067.htm
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Menlo Park, CA
Last modified: 7/19/2006
