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| Value | Definition |
|---|---|
| H2O | body of water |
| Qya | Younger alluvium (Quaternary) |
| Qs | Dune and beach sand, where mapped (Quaternary) |
| Qf | Alluvial fan deposits (Quaternary) |
| Qv | Volcanic rocks (Quaternary) |
| Qt | Alluvial deposits on low- and intermediate-level terraces associated with modern streams (Quaternary) |
| Qth | Alluvial deposits on high-level terraces (Pleistocene and Pliocene?) |
| Qg | Glacial deposits (Pleistocene) |
| Qby | Batter Formation (Pleistocene) |
| Qhc | Hookton Formation (Pleistocene) |
| Qm | Small marine terrace deposits near Cape Mendocino (Pleistocene) |
| QToa | Older alluvium (Pleistocene and (or) Pliocene) |
| Qrb | Red Bluff Formation (Pleistocene) |
| Qsc | Surpur Creek unit of the Prairie Creek formation (Pleistocene (and Pliocene?)) |
| Qms | Skunk Cabbage unit of Prairie Creek Formation (Pleistocene) |
| QTgb | Gold Bluffs unit of the Prairie Creek Formation (Pliocene and Pleistocene) |
| QTf | Falor Formation (Pleistocene and late Pliocene) |
| QTw | Wildcat Formation, undivided (Pleistocene to late Miocene) |
| Qc | Carlotta Formation (early Pleistocene) |
| Pu | Scotia Bluffs and Rio Dell Formations (late Pliocene) |
| Pl | Eel River Formation (early Pliocene) |
| Mu | Pullen Formation (late Miocene) |
| Tsg | St. George Formation (earliest Pliocene and latest Miocene) |
| Tt | Tyee Formation (middle Eocene) |
| Tss | Marine sandstone and siltstone (middle Eocene) |
| Tsc | Marine deposits ranging from conglomerate to mudstone (early Eocene) |
| Tsm | Marine sandstone, siltstone, and mudstone (early Eocene and Paleocene?) |
| Teh | Tehama Formation (Pliocene) |
| Tus | Tuscan Formation (Pliocene) |
| Tv | Volcanic rocks (Pliocene) |
| Tms | Sedimentary rocks (Miocene) |
| Tg | Remnant patches of old high-level nonmarine gravels (Pliocene?) |
| Twi | Wimer Formation (earliest Pliocene and late Miocene?) |
| Ti | Alkalic intrusive rocks (Oligocene) |
| Tw | Weaverville Formation (early Miocene and/or late Oligocene) |
| Tvs | Sedimentary and volcanic rocks (Oligocene and Eocene) |
| Ts | Sedimentary rocks (Eocene) |
| Tmc | Montgomery Creek Formation (Eocene) |
| Ty | Yager Formation (late Eocene to Paleocene) |
| TKc | Coastal belt rocks (late Eocene to Late Cretaceous) |
| Tkr | King Range terrane (middle Miocene) |
| Ku | Late Cretaceous shallow-marine sedimentary rocks of coastal Oregon (Maastrichtian and Campanian) |
| Kl | Marine sedimentary rocks of coastal Oregon (Early Cretaceous) |
| KJm | Myrtle Group (Early Cretaceous and Late Jurassic) |
| Kh | Hornbrook Formation (Late Cretaceous) |
| Kc | Chico (aka Redding) Formation (Late Cretaceous) |
| Kgv | Great Valley sequence (Early Cretaceous) |
| os | Remnants of old upland surfaces in Klamath Mountains and Coast Ranges (Pleistocene to late Miocene) |
| Value | Definition |
|---|---|
| contact, approx. located | Contact whose position is not precisely known |
| contact, certain | Observed contact |
| fault, approx. located | Fault whose position is not precisely known |
| fault, certain | Observed fault |
| fault, concealed | Concealed fault whose position is inferred |
| map boundary, certain | Boundary of mapped area |
| ridgecrestbelow2000m, certain | Mountain ridge crest that is below 2000 meters |
| ridgecrestabove2000m, certain | Mountain ridge crest that is above 2000 meters |
| scratch boundary | Scratch boundary |
| water boundary, certain | Boundary of a body of water |
| Value | Definition |
|---|---|
| laterite | nickeliferous lateritic soil |
| Value | Definition |
|---|---|
| laterite | nickeliferous lateritic soil |
| Value | Definition |
|---|---|
| scratch boundary | Scratch boundary surrounding lateritic soils |
I thank Carl Wentworth for encouraging me to prepare a digital version of this report. Scott Graham patiently taught and assisted me in digitizing the map, and Scott and Gregg Beukelman prepared to documentation for the digital database.
To provide to the public a digital database of the Klamath mountain region.
Are there legal restrictions on access or use of the data?Access_Constraints: none
Use_Constraints: none
This report is preliminary and has not been reviewed for conformity with U. S. Geological Survey editorial standards. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U. S. Government.
This database, identified as "Preliminary map of selected post-nevadan geologic features of the Klamath Mountains and adjacent areas, California and Oregon: A digital database," has been approved for release and publication by the Director of the USGS. Although this database has been reviewed and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. This database is released on condition that neither the USGS nor the U. S. Government may be held liable for any damages resulting from its use.
| Data format: |
ARC/INFO export files Description of coverage kla-geol.e00 Depositional contacts, faults, and unit labels kla-pts.e00 Location of nickeliferous lateritic soils (point data) kla-soils.e00 Location of nickeliferous lateritic soils (areal data) kla-topo.e00 Topographic base map taken from a scan of portions of the Oregon and California state topographic mapsin format ARCE (version 7.x) Size: 12 |
|---|---|
| Network links: |
http://pubs.usgs.gov/of/1997/of97-465/klam.tar.gz |