Overlying surficial deposits and absent areas for the Inyan Kara Group, Black Hills area, South Dakota.

Data describing where the Inyan Kara Group is directly overlain by surficial
deposits and areas where the formation is absent were used in the production of
structure-contour maps for the top of the Inyan Kara Group (inkrscon). This
data set was created as part of the Black Hills Hydrology Study (BHHS). The
BHHS is a long-term investigation that was initiated in 1990 as a cooperative
effort between the U.S. Geological Survey (USGS), the South Dakota Department
of Environment and Natural Resources (DENR), and the West Dakota Water
Development District. West Dakota represents various local and county
cooperators. The purpose of the study is to assess the quantity, quality, and
distribution of surface and ground water in the Black Hills area of western
South Dakota (Driscoll, 1992). The study area includes parts of Butte, Custer,
Fall River, Lawrence, Meade, and Pennington counties in South Dakota.

This data set describes areas where the Inyan Kara Group is directly overlain
by surficial deposits, as well as those areas where the Inyan Kara Group is
absent in the Black Hills area, South Dakota.