| Abstract: | New geologic mapping within the Sand Creek Pass 7.5 minute quadrangle defines geologic relationships within the northern Front Range of Colorado along the Wyoming border approximately 35 km south of Laramie, Wyo. Previous mapping within the quadrangle was limited to regional reconnaissance mapping; Eaton Reservoir 7.5 minute quadrangle to the east (2008), granite of the Rawah batholith to the south (1983), Laramie River valley to the west (1979), and the Laramie 30‘ x 60‘ quadrangle to the north (2007). Fieldwork was completed during 1981 and 1982 and during 2007 and 2008. Mapping was compiled at 1:24,000-scale. Minimal petrographic work was done and no isotope work was done in the quadrangle area, but detailed petrographic and isotope studies were performed on correlative map units in surrounding areas as part of a related regional study of the northern Front Range. Stratigraphy of Proterozoic rocks is primarily based upon field observation of bulk mineral composition, macroscopic textural features, and field relationships that allow for correlation with rocks studied in greater detail outside of the map area. Stratigraphy of Phanerozoic rocks is primarily based upon correlation with similar rocks to the north in the Laramie Basin of Wyoming and to the east in the Front Range of Colorado. |
| Genre: | USGS Numbered Series |
| ProdID: | 98894 |
| Citation Author: | Workman, Jeremiah B.; Braddock, William A. |
| Citation Contributing Office: | Environmental Change Science Center |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | - |
| Citation Editor: | |
| Citation End Page: | |
| Citation Issue: | |
| Citation Keywords: | |
| Citation Language: | ENGLISH |
| Citation Larger Work Title: | |
| Citation LatN: | 0410000 |
| Citation LatS: | 0405230 |
| Citation LonE: | -1054500 |
| Citation LonW: | -1055230 |
| Citation Month: | |
| Citation No Pagination: | Y |
| Citation Number Of Pages: | |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | 1 Map Sheet; 1 Map Sheet: 50.07 inches x 30.00 inches; Downloads Directory |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | U.S. Geological Survey |
| Citation Series: | Scientific Investigations Map |
| Citation Series Code: | SIM |
| Citation Series Number: | 3133 |
| Citation Search Results Text: | Geologic map of the Sand Creek Pass quadrangle, Larimer County, Colorado, and Albany County, Wyoming; 2010; SIM; 3133; Workman, Jeremiah B.; Braddock, William A. |
| Citation Start Page: | |
| Citation Volume: | |
| Citation Year: | 2010 |
| Type: | citation/reference |
| Text: | Geologic map of the Sand Creek Pass quadrangle, Larimer County, Colorado, and Albany County, Wyoming; 2010; SIM; 3133; Workman, Jeremiah B.; Braddock, William A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/sim_3133.jpg |
| URL (INDEX PAGE): | http://pubs.usgs.gov/sim/3133/ |
| Date Other: | Wed, 24 Nov 2010 00:00 -0600 |
| Publisher: | U.S. Geological Survey |
