Geologic map of the Christian quadrangle, Alaska

Online link https://geo-nsdi.er.usgs.gov/metadata/open-file/00-192/metadata.faq.html
Description This data set represents reconnaissance geologic mapping of the Christian quadrangle, Alaska. It is used to create the mapsheet in USGS OFR 00-192, which shows bedrock and surficial deposits of the 1:250,000 scale Christian quadrangle in northern Alaska.
Originators Brosgé, William P. and Reiser, Hans N.
Publication U.S. Geological Survey Open-File Report 00-192

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arcs

Characteristic of the arc features in coverage csgeol are coded in csgeol.aat, the arc attribute table. The .aat consists of the following items: ARC-CODE and LINETYPE

Label Definition
arc-code Arc-code is a positive integer value (3 3 I) item in the arc attribute table. Values range from 0 to 99. Arc-code describes the stratigraphic boundary, fault, or other linear feature. The code is described by the item LINETYPE.

polygons

Characteristic of the polygon features are coded in the polygon attribute table. Table csgeol.pat includes of the following items: CLASS, UNIT (geologic unit label), and UNITTYPE (geologic unit).

Label Definition
class Class is a positive integer value (4 5 B) item in the polygon attribute table. Values range from 102 to 1170. The table csgeol.lut contains class and the corresponding geologic label. See USGS Open-File Report 00-192 for full descriptions of the geologic units.

points

Characteristic of point features in coverage cssstruct are coded in csstruct.pat, the point attribute table. The .pat includes the following items: ANGLE, DIP, CODE, and POINTTYPE.

Label Definition
angle Angle is a positive integer value (3 3 I) item in the point attribute table. Values may range from 0 to 360 degrees. The value is the azimuthal measurement of strike, where North is 0 degrees and values increase clockwise.
dip Dip is a positive integer value (3 3 I) in the point attribute table. Values may range from 0 to 90 degrees.
code Code is a positive integer value (3 3 I) item in csstruct.pat. It is a coded value representing the type of structure measured. Item pointtype is a text field which describes the type of measurement.