Name: USDW - Devonian Outcrop

Display Field: Shape.area

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This data layer contains the Devonian outcrop polygons for Ohio. The polygons were originally derived from the 1:24,000-scale bedrock-geology maps, that were created between 1989 through 1998. The bedrock-geology mapping program was initiated in the mid-1980s to perform detailed, 1:24,000-scale bedrock-geology maps. In 1991, the mapping approach was amended to a reconnaissance mapping methodology, but retaining the 1:24,000 scale. Both detail and reconnaissance bedrock-geologic maps were used as the basic information to compile the 1:500,000-scale, Bedrock Geologic Map of Ohio. The Devonian outcrop polygons were then extracted from the 1:500,000-scale, Bedrock Geologic Map of Ohio.

Service Item Id: b7d9878b602241629eecab03ac83023d

Copyright Text: Production of the 7.5-minute, reconnaissance and detailed, bedrock-geology maps was facilitated by funding provided by the Ohio minerals severance tax and grants from the U.S. Geological Survey COGEOMAP Program and STATEMAP component of the National Cooperative Geologic Mapping Program, the Ohio Department of Transportation, and the Ohio Environmental Protection Agency under provisions of Section 319(h) of the Clean Water Act as amended in 1987. Completion of this map and the bedrock mapping program were facilitated by significant contributions by H. R. Collins, D. N. Hull, T. M. Berg, R. L. Stewart, J. McDonald, K. Callahan, E. V. Kuehnle, J. A. Kriz, R. T. Link, D. A. Stith, C. S. Brockman, K. E. Vorbau, R. R. Pavey, M. T. Baranoski, R. W. Carlton, L. Van Doren, and R. O. Klingbeil. Cross section digitization by J. L. Fox. Reconnaissance mapping consultations provided by C. H. Summerson, J. T. Dutro, and W. D. Martin, who kindly contributed data also on the Dunkard Group in Athens and Washington Counties. S. M. Bergström, G. K. Merrill, B. M. Blake, L. E. Babcock, and M. A. Kleffner graciously assisted with geologic age refinement.

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YMin: 222729.97008901834
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Spatial Reference: 102723  (3735)

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Type ID Field: null

Fields:

• Shape.area ( type: esriFieldTypeDouble, alias: Shape.area )
• Shape.len ( type: esriFieldTypeDouble, alias: Shape.len )
• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• Shape ( type: esriFieldTypeGeometry, alias: Shape )

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

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