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Site content related to keyword: "modified land"

GM22 Geologic map of the Sharptown, Laurel, Hebron and Delmar Quadrangles, Delaware

GM22 Geologic map of the Sharptown, Laurel, Hebron and Delmar Quadrangles, Delaware

The geological history of the surficial geologic units in western Sussex County is that of deposition of the Beaverdam Formation and its subsequent modification by erosion and deposition related to the sea-level fluctuations during the Pleistocene. The geology reflects this complex history by the cut and fill geometry of the middle and late Pleistocene deposits into the Beaverdam Formation. The geology is further complicated by periglacial activity that produced dune deposits and Carolina Bays in the map area, which modified the land surface. Mapping was conducted using field maps at a scale of 1:12,000 with 2-ft contours. Stratigraphic boundaries drawn at topographic breaks reflect detailed mapping using contours not shown on this map.

GM20 Geologic Map of the Millsboro and Whaleysville Quadrangles, Delaware

GM20 Geologic Map of the Millsboro and Whaleysville Quadrangles, Delaware

The geological history of the surficial units of the Millsboro Quadrangle and
Delaware portion of the Whaleysville Quadrangle was the result of deposition of the
Beaverdam Formation during the late Pliocene and its subsequent modification by
erosion and deposition related to sea-level fluctuations during the Pleistocene and late
Pleistocene upland swamp and bog deposition. The geology at the land surface was then
further modified by periglacial activity that produced dune deposits and Carolina Bays in
the map area. Surficial geologic mapping was conducted using field maps at a scale of
1:12,000 with 2 foot contours. Stratigraphic boundaries drawn at topographic breaks
reflect detailed mapping using contours not shown on this map.

DGS Geologic Map No. 20 (Millsboro and Whaleysville Quadrangles) Dataset

DGS Geologic Map No. 20 (Millsboro and Whaleysville Quadrangles) Dataset

This vector data set contains the rock unit polygons for the surficial geology in the Delaware Coastal Plain covered by DGS Geologic Map Series No. 20 (Millsboro and Whaleysville Quadrangles). The geological history of the surficial units of the Millsboro Quadrangle and Delaware portion of the Whaleysville Quadrangle was the result of deposition of the Beaverdam Formation during the late Pliocene and its subsequent modification by erosion and deposition related to sea-level fluctuations during the Pleistocene and late Pleistocene upland swamp and bog deposition. The geology at the land surface was then further modified by periglacial activity that produced dune deposits and Carolina Bays in the map area. Surficial geologic mapping was conducted using field maps at a scale of 1:12,000 with 2 foot contours. Stratigraphic boundaries drawn at topographic breaks reflect detailed mapping using contours not shown on this map. An additional dataset of datapoints used to generate rock unit polygons for the surficial geology in the Delaware Coastal Plain covered by DGS Geologic Map Series No. 20 (Millsboro and Whaleysville Quadrangles) exists for use in conjunction with this dataset.

GM19 Geologic Map of the Frankford and Selbyville Quadrangles, Delaware

GM19 Geologic Map of the Frankford and Selbyville Quadrangles, Delaware

The geological history of the surficial units of the Frankford and Delaware
portion of the Selbyville Quadrangles was the result of deposition of the Beaverdam
Formation during the late Pliocene and its subsequent modification by erosion and
deposition related to sea-level fluctuations during the Pleistocene. The geology at the
land surface was then further modified by periglacial activity that produced dune deposits
in the map area. Surficial geologic mapping was conducted using field maps at a scale of
1:12,000 with 2 foot contours. Stratigraphic boundaries drawn at topographic breaks
reflect detailed mapping using contours not shown on this map.

DGS Geologic Map No. 19 (Frankford and Selbyville Quadrangles) Dataset

 DGS Geologic Map No. 19 (Frankford and Selbyville Quadrangles) Dataset

This vector data set contains the rock unit polygons for the surficial geology in the Delaware Coastal Plain covered by DGS Geologic Map Series No. 19 (Frankford and Selbyville Quadrangles). The geological history of the surficial units of the Frankford and Delaware portion of the Selbyville Quadrangles is that of deposition of the Beaverdam Formation during the late Pliocene and its subsequent modification by erosion and deposition related to sea-level fluctuations during the Pleistocene. The geology at the land surface was then further modified by periglacial activity that produced dune deposits in the map area. Mapping was conducted using field maps at a scale of 1:12,000 with 2 foot contours. Stratigraphic boundaries drawn at topographic breaks reflect detailed mapping related to contours not shown on this map. An additional dataset of datapoints used to generate rock unit polygons for the surficial geology in the Delaware Coastal Plain covered by DGS Geologic Map Series No. 19 (Frankford and Selbyville Quadrangles) exists for use in conjunction with this dataset.