Bedrock Geologic Map of the Windham Quadrangle, Rockingham and Hillsborough Counties, New Hampshire: Polygon coverage for bedrock geologic units.

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Description Polygon coverage for bedrock geologic units. The geologic data was mapped during the summer of 1998 at a scale of 1:24,000. The bedrock geology was mapped using standard techniques. Locational information was provided by Rockwell PLGR+96 GPS receivers us
Originators Walsh, Gregory J. and Clark, Stewart F., Jr.
Publication U.S. Geological Survey Open-File Report 99-8

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polygon attribute table for bedrock geologic units

Label Definition
CODE geologic unit label designators
LBLTXT cartographic item used for selective plotting of polygon labels
TYPE general category of rock unit


arc attribute table for geologic contacts

Label Definition
TYPE type of geologic contact


lookup table describing characteristics of geologic polygons in PAT file

Label Definition
CODE same as code in PAT file
AGE_SORT relative age of rock units, by rank (integer values, 1 is youngest, 12 oldest)
MAP_UNIT brief description of geologic map unit (character text)
FORMATION name of geologic formation or rock unit (character text)
AGE geologic age of map unit