[Graphic,12K,GIF]
Schematic drawing of erupting volcano showing tephra types
-- Modified from: Gardner, et.al., 1995, USGS Open-File Report 95-498

["Pictogram",278K,InlineGIF]
Volcanic Ash

[Map,14K,InlineGIF]
Distribution within the United States of May 18, 1980 ash fallout from Mount St. Helens
-- Modified from: Tilling, Topinka, and Swanson, 1990

[Map,22K,InlineGIF]
May 18, 1980 Ash Plume Path
-- Modified from: Sarna-Wojcicki, et.al., 1981, IN: USGS Professional Paper 1250

[Schematic,25K,GIF]
West-East Geologic Section of gully bank near NE base of Mount St. Helens, south of Windy Ridge
-- Modified from: Doukas, 1990, USGS Bulletin 1859

[Map,14K,InlineGIF]
Annual probablility of 10 centimeters or more of tephra accumulation in Washington and Oregon from major Cascade volcanoes
-- Modified from: Scott, et.al., 1995, USGS Open-File Report 95-492

[Graphic,18K,InlineGIF]
Plot of thickness vs. distance from vent for several tephras from Cascade Range volcanoes.
-- Modified from: Hoblitt, et.al., 1987, USGS Open-File Report 87-297

[Table,14K,GIF]
Holocene tephras from Mount Rainier
-- Modified from: Swanson, et.al., 1989, AGU Field Trip Guidebook T106, Taken from; Mullineaux, 1974

[TableHTML]
Source, age, and description of some postglacial pyroclastic deposits in Mount Rainier National Park
-- Modified from: Crandell, 1971, USGS Professional Paper 677

[Graphic,12K,GIF]
Stratigraphic section of Mazama ash exposed in excavation at West Village parking lot, at Mount Bachelor. Letter and number symbols to right of column are horizon designations of surface and buried soils.
-- Modified from: Scott and Gardner, 1990

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