Surficial geologic maps along riparian zone of Animas River and headwater tributaries, Silverton to Durango, Colorado

Surficial geologic maps along the riparian zone of the Animas River and its
headwater tributaries, Silverton to Durango, Colorado, with upper Animas River
watershed gradient profiles

This map data was completed for the purpose of identifying the surficial
deposits along the riparian zone of the Animas River and its major headwater
tributaries. Mapped surficial units that were deposited before and after the
onset of mining were analyzed to determine the geochemical baseline of
sediments in the watershed.

This product consists of Adobe Acrobat .PDF format documents for 10
surficial geologic strip maps along the Animas River watershed from its major
headwater tributaries, south to Durango, Colo. The Animas River originates in
the San Juan Mountains north of the historic mining town of Silverton, Colo.
The surficial geologic maps identify surficial deposits, such as floodplain,
and terrace gravels, alluvial fans, glacial till, talus, colluvium, landslides,
and bogs. Sixteen primary units were mapped that included human-related
deposits and structures, eight alluvial deposits, four colluvial deposits, one
glacial deposit, one travertine deposit, and undifferentiated bedrock. Each of
the surficial geologic strip maps has .PDF links to surficial geology
photographs, which enables the user to take a virtual tour of these deposits.
Geochemical data collected from mapped surficial deposits that pre-date and
post-date mining activity have aided in determining the geochemical baseline in
the watershed. Several photographs with their corresponding geochemical
baseline profiles are accessible through .PDF links from several of the maps.
A single coverage for all surficial deposits mapped is included as an ArcInfo
shape file and as an Arc Export format .e00 file.

This product consists of one vector coverage. This coverage is that of the
surficial deposits mapped along the riparian zone of the Animas River from its
headwater tributaries above Silverton to Durango, Colo.