geo_poly.e00 stratigraphic contacts and geologic units geo_line.e00 structural features such as dikes and faults geo_pnt.e00 structural orientations, and sample localities neatline.e00 neatline border for map graphics.e00 graphic representations of point symbols rfossil1112.tif Topographic base map image rfossil1112.tfw Topographic image georeference information
Online Links:
| Value | Definition |
|---|---|
| Qu | Alluvial and glacial deposits, undivided (Holocene and Pleistocene) |
| Ts | Gravel and alluvial deposits (Pliocene and Miocene?) |
| Tr | Rhyolite dikes, sills, and stocks (Oligocene) |
| Tgm | Porphyry of Green Mountain (Oligocene) |
| TKt | Tonalite stock and sill at Cumberland Pass (early Tertiary to Late Cretaceous?) |
| Kf | Fossil Ridge Latite (Late Cretaceous) |
| Ku | Sedimentary rocks, undivided (Upper Cretaceous) (this value does not appear in the data) |
| Kd | Dakota Sandstone (Upper Cretaceous) |
| Jm | Morrison Formation (Upper Jurassic) (this value does not appear in the data) |
| Jj | Junction Creek Sandstone (Upper Jurassic) |
| Jmj | Morrison Formation and Junction Creek Sandstone (Upper Jurassic) |
| Pg | Gothic Formation (Middle Pennsylvanian) |
| Pb | Belden Formation (Middle Pennsylvanian) |
| Ml | Leadville Limestone (Lower Mississippian) |
| MDc | Chaffee Group (Lower Mississippian? and Upper Devonian) |
| Ofh | Fremont Limestone (Upper Ordovician) and Harding Sandstone (Middle Ordovician) |
| Om | Manitou Dolomite (Lower Ordovician) |
| Ou | Fremont Limestone, Harding Sandstone, and Manitou Dolomite, undivided (Upper Ordovician to Lower Ordovician) |
| Cs | Sawatch Quartzite (Upper Cambrian) |
| Yg | Granite (Middle(?) Proterozoic) |
| Yt | Granite of Taylor River (Middle (?) Proterozoic) |
| YXgb | Gabbro dikes (Middle to Early Proterozoic) |
| Xa | Granodiorite at Almont (Early Proterozoic) (this value does not appear in the data) |
| Xf | Fairview Peak Granodiorite (Early Proterozoic) |
| Xmg | Metagabbro near Almont (Early Proterozoic) |
| Xh | Henry Mountain Granite (Early Proterozoic) |
| Xw | Willow Monzonite (Early Proterozoic) |
| Xwg | Monzogabbro (to gabbro-diorite) part of the Willow Monzonite (Early Proterozoic) |
| Xc | Crystal Gabbro (Early Proterozoic) |
| Xb | Granodiorite of Broncho Mountain (Early Proterozoic) |
| Xr | Roosevelt Granite (Early Proterozoic) |
| Xs | Metasedimentary rocks (Early Proterozoic) |
| Xgb | Metagabbro (Early Proterozoic) |
| Xfv | Felsic metavolcanic rocks (Early Proterozoic) |
| Xiv | Intermediate-composition metavolcanic and metasedimentary rocks (Early Proterozoic) |
| Xmv | Mafic metavolcanic rocks (Early Proterozoic) |
| LAKE | surface water body |
| Value | Definition |
|---|---|
| (no value) | |
| approximate | |
| certain | |
| Certain | |
| concealed | position inferred from other evidence(?) |
| Value | Definition |
|---|---|
| (no value) | |
| colorboundary | |
| contact | separates geologic units |
| Value | Definition |
|---|---|
| 0 |
| Value | Definition |
|---|---|
| (no value) | feature is not a fault |
| Normal | |
| Thrust Fault |
| Value | Definition |
|---|---|
| (no value) | |
| Approximate | |
| Certain | |
| Concealed | |
| Inferred |
| Value | Definition |
|---|---|
| (no value) | feature is not a fold |
| Anticline | |
| Monocline | |
| Syncline |
| Value | Definition |
|---|---|
| (no value) | |
| Kf | Fossil Ridge Latite (Late Cretaceous) |
| Kf? | Fossil Ridge Latite (Late Cretaceous) |
| Tr | Rhyolite dikes, sills, and stocks (Oligocene) |
| YXgb | Gabbro dikes (Middle to Early Proterozoic) |
| Value | Definition |
|---|---|
| Dike | |
| Fault | |
| Fold | |
| quartz-bubnerite-molybdenite-veinlets |
| Value | Definition |
|---|---|
| 0 |
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 96 |
| Units: | degrees |
| Resolution: | 1 |
| Value | Definition |
|---|---|
| bedding-inclined | |
| bedding-overturned | |
| foliation-inclined | |
| foliation-vertical | |
| igneous flow foliation-vertical | |
| joint-inclined | |
| joints-vertical | |
| veinlet point |
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 538 |
| Resolution: | 1 |
Geology mapped by Ed DeWitt, R.S. Zech, C.G. Chase, Bruce Bartleson, C.G. Rosenlund, and Drummond Early III.
Geochronology by Ed DeWitt and R.E. Zartman.
Geophysics by R.A. Martin, Bob Kucks, and Ed DeWitt.
The ArcInfo database was created by RedZone Software. ArcInfo database reviewed by Nancy Shock, who also prepared the ArcInfo files for importing into Illustrator. The Adobe Illustrator layout, which was used for the printed map and for the PDF browse graphic, was prepared by Gayle Dumonceaux. Metadata file prepared by F.C. Brunstein.
This GIS geologic map database is provided to facilitate the presentation and analysis of earth-science data for this region of Colorado. This digital map database may be displayed at any scale or projection. However, the geologic data in this coverage are not intended for use at a scale other than 1:30, 000. Supplemental useful data accompanying the database are extensive geochemical and mineral deposits data, as well as an aeromagnetic map.
Are there legal restrictions on access or use of the data?Access_Constraints: None
Use_Constraints: None
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this data has been used by the U.S. Geological Survey (USGS), no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data, software, or related materials.
| Data format: | Geologic units and structural features in format ARCE (version 7) Size: 2 |
|---|---|
| Network links: |
http://pubs.usgs.gov/imap/i-2738/i-2738.tar.gz http://pubs.usgs.gov/imap/i-2738/i-2738.zip |
| Data format: | Topographic base map with georeference information in format TIFF (version 6) Size: 5 |
|---|---|
| Network links: |
http://pubs.usgs.gov/imap/i-2738/base.zip http://pubs.usgs.gov/imap/i-2738/base.tar.gz |
