Digital Geodata Series
DGS97-2 Surficial Geology of Middlesex County, New Jersey
DGS97-2 is an ARC/INFO Geographic Information Systems (GIS) coverage of surficial
geologic materials of Middlesex County, New Jersey. Surficial materials are
the unconsolidated sediments that overlie bedrock or Coastal Plain formations,
and that are the parent material for agronomic soils. In Middlesex County,
they include stream, wetland, glacial, estuarine, windblown, and hillslope
sediments and weathered bedrock material. They are as much as 140 feet thick,
but are generally less than 40 feet thick over most of the county. These
materials range from coarse gravel to clay and peat. They affect the movement
of ground water from the surface into underlying bedrock and Coastal Plain
aquifers, and are aquifers themselves in places. They also provide foundation
support for structures, and supply sand and gravel for construction projects.
This map was simplified for this display by combining 26 lithostratigraphic
units available with DGS97-2 into three units.