20230202
08550300
1.0
FGDC CSDGM Metadata
FALSE
potomac_007_topseal_thick
002
1600084.787100
1847329.068700
-122884.753700
510033.943600
1
0.000
Projected
GCS_WGS_1984
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Linear Unit: Meter (1.000000)
WGS_1984_Web_Mercator_Auxiliary_Sphere
20230601
20461600
20230601
20461600
FGDC
Bureau of Economic Geology
10100 Burnet Rd. Bldg. 130
Austin
TX
78729
US
8-5
20230601
ArcGIS Metadata
1.0
BEG
10100 Burnet Rd. Bldg 139
Austin
Texas
78758
US
Enterprise Geodatabase Feature Class
0.000
Potomac Top Seal Thickness
<DIV STYLE="text-align:Left;"><P STYLE="font-size:16ptmargin:7 0 7 0;"><SPAN>Top-seal thickness. Several studies define the confining unit above the lower Potomac aquifer (Trapp, 1992; Trapp and Meisler, 1992). It is generally composed of "tough" or "hard" clay and sandy clay beds. It is regionally continuous from North Carolina to New Jersey and generally ranges in thickness from 50 to 100 ft but exceeds 1,000 ft toward the mouth of Delaware Bay (Trapp, 1992). Trapp (1992) provided a map showing the thickness distribution of the lower Potomac confining unit across the area of interest, and this map was digitized.</SPAN></P><DIV><P><SPAN /></P></DIV></DIV>
Top Seal Thickness for Potomac Group
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.
New Jersey
Delaware
Maryland
Lower Potomac Group
Lower Potomac Group
Maryland
Delaware
New Jersey
Access constraints: Restriction Code: other restrictions; Other Constraints: Access constraints: None
See access and use constraints information.
Esri ArcGIS 13.1.0.41833
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002
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dataset
EPSG
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Simple
FALSE
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TRUE
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potomac_007_topseal_thick
Feature Class
0
OBJECTID
OBJECTID
OID
4
10
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Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Shape
Geometry
8
0
0
Feature geometry.
ESRI
Coordinates defining the features.
SEG_ID
SEG_ID
Integer
4
10
0
SEAL_FT_
SEAL_FT_
Double
8
38
8
SEAL_M_
SEAL_M_
Double
8
38
8
source_organization
Source Organization
String
255
0
0
hyperlink
Link
String
255
0
0
resource_date
Date of Resource
String
255
0
0
Shape_Leng
Shape_Leng
Double
8
38
8
st_length(shape)
st_length(shape)
Double
0
0
0
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