Name: potomac_005_shale

Display Field: LIMES_PER_

Type: Feature Layer

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Description: A number of studies present cross sections that include geophysical logs (gamma ray, spontaneous potential, resistivity) that can be used to derive a semiquantitative estimate percent shale within the lower Potomac aquifer (Hansen, 1968; Brown and others, 1972; Cushing and others, 1973; Trapp and others, 1984). Anderson (1948) and Benson and others (1985) provided grain-size analysis results from cores that can also be used to evaluate percent shale within the lower Potomac aquifer. Otton and Mandle (1984) and Hansen (1984) provided information regarding distribution of shale within the Potomac Group, but their maps cover only a portion of the area of interest. Brown and others (1972) provided a percent-shale map of the lower Potomac stratigraphic interval that covers the entire area of interest, and this map is used for the GIS.

Service Item Id: bdb76fff7f72480a921f7c6b93faa58f

Copyright Text: 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.

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Supported Query Formats: JSON, geoJSON, PBF

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XMin: -8627134.257
YMin: 4104154.806900002
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Spatial Reference: 102100  (3857)

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Type ID Field: null

Fields:

• objectid ( type: esriFieldTypeOID, alias: OBJECTID )
• edx_sp_csod.sde.potomac_005_percentshale.area ( type: esriFieldTypeDouble, alias: edx_sp_csod.sde.potomac_005_percentshale.area )
• perimeter ( type: esriFieldTypeDouble, alias: PERIMETER )
• a_ ( type: esriFieldTypeDouble, alias: A_ )
• limes_per_ ( type: esriFieldTypeString, alias: LIMES_PER_, length: 14 )
• clastic_pe ( type: esriFieldTypeString, alias: CLASTIC_PE, length: 14 )
• sand_per_ ( type: esriFieldTypeString, alias: SAND_PER_, length: 14 )
• shale_per_ ( type: esriFieldTypeString, alias: SHALE_PER_, length: 14 )
• shape_leng ( type: esriFieldTypeDouble, alias: Shape_Leng )
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• st_area(shape) ( type: esriFieldTypeDouble, alias: st_area(shape) )
• st_perimeter(shape) ( type: esriFieldTypeDouble, alias: st_perimeter(shape) )

Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

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