Geologic map of the Seldovia quadrangle, south-central Alaska

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Description USGS Open-File Report 99-18B is a digital representation of a paper map that is being released simultaneously, USGS Open-File Report 99-18A. The map shows the bedrock geology of the Seldovia quadrangle, Alaska, at a scale of 1:250,000, compiled from new
Originators Bradley, Dwight C.; Kusky, T. M.; Haeussler, Peter J.; Karl, Susan M.; and Donley, D. T.
Publication U.S. Geological Survey Open-File Report OFR 99-18B

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Characteristics of arcs in svgeol.aat and svfold.aat

Label Definition
arc-code Arc-code is a positive integer value (3 3 I) item in the arc attribute table. Values range from 1-99. It codes the type of line feature.


Characteristics of polygon features. Generally these are rock units characterized by a number that is a key into a lookup table (svgeol.lut).

Label Definition
class Class is a positive integer value (4 5 B) item in the polygon attribute table. Values range from 0-1071. The coverage has a lookup table, svgeol.lut, which contains each class value with a geologic unit label. See the publication for full rock unit descriptions.