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File:River valley filled in by pyroclastic flows, Mt. Pinatubo.jpg

River_valley_filled_in_by_pyroclastic_flows,_Mt._Pinatubo.jpg(350 × 454 pixels, file size: 23 KB, MIME type: image/jpeg)

River valley filled in by pyroclastic flows from 1991 eruption of Mt. Pinatubo. Aerial views of Maloma and Marella River valleys comparing preeruption terrain (A) and posteruption terrain with fill of pyroclastic-flow deposits (B). Orientation of both views is northeast toward Mount Pinatubo, but B was taken from a position slightly east of and at higher altitude than that of A. Note hill surrounded by pyroclastic-flow deposits near centre of B and compare with A. Main (east fork) channel of Marella River to east (right) of knob has been filled to a depth of about 200 m.

Source: Fig.2 on

Both photographs by R.P. Hoblitt; A, June 3, 1991; B, June 23, 1991.)

Public domain This image is in the public domain because it contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.

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