General Setting
Information Search and Selection

Com ments

on

Geo logic

Para meters

1 Depth:

2 Permeability/Hydraulic Conductivity:

3 Formation Thickness:
4 Net Sand Thickness:
5 Percent Shale:
6 Continuity:
7 Top Seal Thickness:
8 Continuity of top seal:
9 Hydrocarbon Production:
10 Fluid Residence Time:
11 Flow Direction Elevation:

12

CO2 Solu bility Brine

 12a Temperature:
12b Pressure:
12c Salinity:
13 Rock/Water Reaction:
14 Porosity:
15 Water Chemistry:
16 Rock Mineralogy:

Lower Potomac Group, Eastern Coastal Plain of Maryland, Delaware, and New Jersey

Comments on Geologic Parameters

1 Depth:

A number of maps show the elevation at the top of the Potomac aquifer (Gill and Farlekas, 1969; Brown and others, 1972; Trapp and Meisler (1992; Trapp, 1992). We chose to use the map of Trapp and Meissler (1992; their plate 7B) because it covers the entire region and clearly defines the hydrostratigraphic unit. We then used a DEM generated from Digital Terrain Elevation Data (National Imagery and Mapping Agency, 2000) to calculate and grid the depth to top of the Potomac brine formation (c1potomac).

1 Map:

1 Reference:

Brown, P. M., Miller, J. A., and Swain, F. M., 1972, Structural and stratigraphic framework, and spatial distribution of permeability of the Atlantic coastal plain, North Carolina to New York: U.S. Geological Survey, Professional Paper 796, 79 p, 59 plates.

Gill, H. E., and Farlekas, G. M., 1969, Geohydrologic maps of the Potomac-Raritan-Magoth aquifer system in the New Jersey coastal plain: U.S. Geological Survey, Hydrologic Investigations Atlas HA-557, 2 sheets

National Imagery and Mapping Agency, 2000, Digital terrain elevation data (DTED Level 0), http:/www.gisdatadept.com.

Trapp, H., Jr., 1992, Hydrogeologic framework of the northern Atlantic coastal plain in parts of North Carolina, Virginia, Maryland, Delaware, New Jersey, and New York: U.S. Geological Survey Professional Paper 1404-G, 59 p., 13 plates.

Trapp, H., Jr., and Meisler, H., 1992, The regional aquifer underlying the northern Atlantic coastal plain in parts of North Carolina, Virginia, Maryland, Delaware, New Jersey, and New York—summary: U.S. Geological Survey, Professional Paper 1404A, 33 p., 11 plates.