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Hyde, Jack H.

Upper Pleistocene pyroclastic-flow deposits and lahars south of Mount St. Helens volcano, Washington / by Jack H. Hyde. - Washington: United States Government Printing Office, 1975. - iv, B20 p. : ill., maps ; 23 cm. - 1383 .

Includes bibliographical references (p. B20).

A study of a valley-sill assemblage of pyroclastic-flow deposits, lahars, and alluvium of late Pleistocene age south of Mount St. Helens volcano.

Subjects--Topical Terms:
Volcanic ash, tuff, etc--Washington (United States)--Saint Helens, Mount
Lahars--Washington (United States)--Saint Helens, Mount
Geology, Stratigraphic--Pleistocene
Geology--Washington (United States)--Saint Helens, Mount

Dewey Class. No.: 557.308