GIS Data
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Physiographic diagrams of the May 18, 1980, landslide-eruption of Mount St. Helens, Washington
This sequence of diagrams shows the complex series of events that culminated in the catastrophic eruption of Mount St. Helens on the morning of May 18, 1980.
Piedmont geology of the Ladysmith and Lake Anna East quadrangles, and vicinity, Virginia
No abstract available.
Preliminary geologic map of the Desert Gulch Quadrangle, Garfield County, Colorado
No abstract available.
Preliminary geologic map of the Sodaville quadrangle, Mineral County, Nevada
No abstract available.
Preliminary geologic map of the Tunnel Spring Quadrangle, Millard County, Utah
No abstract available.
Preliminary map showing recently active breaks along the Maacama Fault zone between Hopland and Laytonville, Mendocino County, California
The southernmost 15 km of this map is a product of a study that began in 1975 as part of a study of recency of faulting in coastal California (Ziony and others, 1974; Buchanan-Banks and others, 1978; Pampeyan , 1979). In February 1975, after being shown evidence of recent faulting in the vicinity of Ukiah by E. C. Winterhalder, Principal Engineering Geologist for Harding - Lawson Associates, Pampe