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Debris-flow and flooding deposits in coastal Venezuela associated with the storm of December 14-16, 1999 Debris-flow and flooding deposits in coastal Venezuela associated with the storm of December 14-16, 1999
Heavy rainfall from the storm of December 14?16, 1999, triggered thousands of shallow landslides on steep slopes of the Sierra de Avila north of Caracas, Venezuela, and caused flooding and massive debris flows in the channels of major drainages that severely damaged coastal communities along the Caribbean Sea. Within this region we characterized geologic conditions where landslides...
Geologic map of the Sauk River 30- by 60-minute quadrangle, Washington Geologic map of the Sauk River 30- by 60-minute quadrangle, Washington
Summary -- The north-south-trending regionally significant Straight Creek Fault roughly bisects the Sauk River quadrangle and defines the fundamental geologic framework of it. Within the quadrangle, the Fault mostly separates low-grade metamorphic rocks on the west from medium- to high-grade metamorphic rocks of the Cascade metamorphic core. On the west, the Helena-Haystack melange and...
Geologic map of the Storm King Mountain quadrangle, Garfield County, Colorado Geologic map of the Storm King Mountain quadrangle, Garfield County, Colorado
New 1:24,000-scale geologic mapping in the Storm King Mountain 7.5' quadrangle, in support of the USGS Western Colorado I-70 Corridor Cooperative Geologic Mapping Project, provides new data on the structure on the south margin of the White River uplift and the Grand Hogback and on the nature, history, and distribution of surficial geologic units. Rocks ranging from Holocene to...
Digital Bathymetric Model of Mono Lake, California Digital Bathymetric Model of Mono Lake, California
In 1986 and 1987, Pelagos Corporation of San Diego (now Racal Pelagos) undertook a bathymetric survey of Mono Lake in eastern California for the Los Angeles Department of Water and Power (DWP). The result of that survey was a series of maps at various scales and contour intervals. From these maps, the DWP hoped to predict consequences of the drop in lake level that resulted from their...
Evolution of the landscape along the Clear Creek Corridor, Colorado: Urbanization, aggregate mining and reclamation Evolution of the landscape along the Clear Creek Corridor, Colorado: Urbanization, aggregate mining and reclamation
Prime agricultural land along the Clear Creek floodplain, Colorado, attracted settlement in the 1850's but the demand for sand and gravel for 1900's construction initiated a sequence of events that exceeded previous interests and created the modified landscape and urban ecosystem that exists today. The Clear Creek valley corridor offers a landscape filled with a persistent visible and...
Geologic map of the Battle Ground 7.5-minute quadrangle, Clark County, Washington Geologic map of the Battle Ground 7.5-minute quadrangle, Clark County, Washington
This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits of the Battle Ground 7.5 minute quadrangle. The database delineates map units that are identified by general age and lithology following the stratigraphic nomenclature of the U.S. Geological Survey. The...