Generalized lithology and lithogeochemical character of near-surface bedrock in the New England region

This geographic information system (GIS) data layer shows the
dominant lithology and geochemical, termed lithogeochemical,
character of near-surface bedrock in the New England region
covering the states of Connecticut, Maine, Massachusetts, New
Hampshire, Rhode Island, and Vermont. The bedrock units in the
map are generalized into groups based on their lithological
composition and, for granites, geochemistry. Geologic provinces
are defined as time-stratigraphic groups that share common features
of age of formation, geologic setting, tectonic history, and lithology.
This data set incorporates data from digital maps of two NAWQA
study areas, the New England Coastal Basin (NECB) and the
Connecticut, Housatonic, and Thames River Basins (CONN) areas and
extends data to cover the states of Connecticut, Maine,
Massachusetts, New Hampshire, Rhode Island, and Vermont.
The result is a regional dataset for the lithogeochemical
characterization of New England (the layer named NE_LITH).
Polygons in the final coverage are attributed according
to state, drainage area, geologic province, general rock type,
lithogeochemical characteristics, and specific bedrock map unit.