| Online link | https://geo-nsdi.er.usgs.gov/metadata/map-i/2627/metadata.faq.html |
|---|---|
| Description | Yucca Mountain, Nye County, Nevada, has been identified as a potential site for underground storage of high-level radioactive nuclear waste. Detailed bedrock geologic maps form an integral part of the site characterization program by providing the fundam |
| Originators | Day, Warren C.; Dickerson, Robert P.; Potter, Christopher J.; Sweetkind, Donald S.; San Juan, Carma A.; Drake, Ronald M., II; and Fridrich, Christopher J. |
| Publication | U.S. Geological Survey Miscellaneous Investigations Series Map I-2627 |
The "Geologic and structure maps of the Wallace 1°x2° quadrangle, Montana and Idaho: a digital database" report (wal250k.pdf) contains a detailed description of each attribute code and a reference to the associated map symbols on the map source materials. The database includes a geologic linework arc attribute table, wal250k.aat, that relates to the wal250k.con (contact look-up table), wal250k.st2 (structure look-up table), wal250k.lgu (linear geologic unit look-up table), and wal250k.ref (source reference look-up table) files; a rock unit polygon attribute table, wal250k.pat, that relates to the wal250k.ru (rock unit look-up table) and wal250k.ref (source reference look-up table) files; and a breccia point attribute table, wal250bc.pat, that relates to the wal250bc.ref (source reference look-up table) files.
http://pubs.usgs.gov/imap/i1509a/wal250k.pdf