1. Geoscience Data Catalog

Geologic Map of the Challis 1°x2° Quadrangle, Idaho

Online link https://geo-nsdi.er.usgs.gov/metadata/map-i/1819/metadata.faq.html
Description The paper version of The geology of the Challis 1°x2° quadrangle, was compiled by Fred Fisher, Dave McIntyre and Kate Johnson in 1992. The geology was compiled on a 1:250,000 scale topographic base map. TechniGraphic System, Inc. of Fort Collins Color
Originators Fisher, F. S.; McIntyre, D. H.; and Johnson, K. M.
Publication U.S. Geological Survey Miscellaneous Investigations Series Map I-1819

Related topics

Bedrock geologic units, Faulting (geologic), Folding (geologic), Geologic maps, Geologic structure, Geospatial datasets, Stratigraphy, Structural geology, GeoscientificInformation

States or counties

Boise, Custer, Lemhi, Valley

Overview of attributes

The 'Geologic and structure map of the Choteau 1 x 2 degree
quadrangle, Montana: a digital database' report (chot250k.pdf)
contains a detailed description of each attribute code and a
reference to the associated map symbols on the map source
materials.  The GIS includes a geologic line work arc attribute
table, chot250k.aat, that relates to the chot250k.con (contact
look-up table), chot250k.st2 (structure look-up table),
chot250k.lgu (linear geologic units table), and the chot250k.ref
(source reference look-up table) files; and a rock unit polygon
attribute table, chot250k.pat, that relates to the chot250k.ru
(rock unit look-up table) and chot250k.ref (source reference
look-up table) files; and a point attribute table, chot250kp.pat,
that relates to the chot250p.sym (symbol description look-up
table) and the chot250p.ref (source reference look-up table).

http://pubs.usgs.gov/imap/i1300/chot250k.pdf