geo.wikisort.org - Mountains
Needle Rock Natural Area[1] is located at the western edge of the West Elk Mountains of Colorado. The surrounding terrain is characterized by laccolithic mountains flanked by precipitous cliffs, extensive talus aprons, forested mesas, canyons, and spacious, well-watered intermontane basins.[2] Needle Rock is an intrusive plug of monzonite porphyry[3] cropping out 3.5 miles (5.6 km) east-northeast (bearing 68°) of the Town of Crawford in Delta County, Colorado, United States. At an elevation of 7,797 feet (2,377 m),[4] the towering rock spire stands 800 feet (240 m) tall above the floor of the Smith Fork of the Gunnison River valley. The massive rock feature originated in the Oligocene geological epoch when magma intruded between existing sedimentary rocks[5] as the crown of a buried laccolith[3] or possibly the underlying conduit of a laccolith.[2] Subsequent erosion has exposed the prominent rock formation seen in the natural area today.
| Needle Rock[1] | |
|---|---|
 Needle Rock in 2016. | |
| Highest point | |
| Elevation | 7,797 ft (2,377 m) |
| Coordinates | 38°43′28″N 107°33′00″W |
| Geography | |
  Needle Rock Colorado | |
| Location | Delta County, Colorado, U.S. |
| Parent range | West Elk Mountains |
| Topo map | USGS 7.5' topographic map Crawford, Colorado |
| Geology | |
| Age of rock | c.a. 28 Ma |
| Mountain type | Igneous Intrusion |
| Climbing | |
| Easiest route | rock |
The Needle Rock Natural Area is managed by the Bureau of Land Management.[6]
See also
- West Elk Mountains
- List of Colorado mountain ranges
- List of Colorado mountain summits
- List of Colorado county high points
References
- "Needle Rock". Geographic Names Information System. United States Geological Survey.
- "Mineral Resources of the West Elk Wilderness and Vicinity, Delta and Gunnison Counties, Colorado: Open-file report 77-751, 110 pp" (PDF). Department of the Interior: United States Geological Survey. 1977.
- Noe, D. C., and Alexander T. Klink. “OF-15-06 Geologic Map of the Crawford Quadrangle, Delta and Montrose Counties, Colorado.” Geologic, 1:24,000. Open File Report. Golden, CO: Colorado Geological Survey, 2015.
- The elevation of Needle Rock includes an adjustment of +1.473 m (+4.83 ft) from NGVD 29 to NAVD 88.
- "America's Volcanic Past: Colorado". Vancouver, Washington: USGS: Cascades Volcano Observatory (CVO). Archived from the original on 2006-09-23. Retrieved 2011-10-13.
- BLM Needle Rock Natural Area Webpage
External links
Needle Rock Article - summitpost.org
Needle Rockat Wikipedia's sister projects
Definitions from Wiktionary
Media from Commons
News from Wikinews
Quotations from Wikiquote
Texts from Wikisource
Textbooks from Wikibooks
Resources from Wikiversity
 State of Colorado | ||
|---|---|---|
Denver (capital) | ||
| Topics |
|    |
| Society |
| |
| Cities |
| |
| Counties |
| |
| Regions |
| |
 Colorado portal | ||
| Protected areas of Colorado | |||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Federal |
| ||||||||||||||||||||||||||||||||
| State |
| ||||||||||||||||||||||||||||||||
| Trails |
| ||||||||||||||||||||||||||||||||
Colorado Department of Natural Resources (web) | |||||||||||||||||||||||||||||||||
 | This Colorado state location article is a stub. You can help Wikipedia by expanding it. |
Текст в блоке "Читать" взят с сайта "Википедия" и доступен по лицензии Creative Commons Attribution-ShareAlike; в отдельных случаях могут действовать дополнительные условия.
Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
2019-2024
WikiSort.org - проект по пересортировке и дополнению контента Википедии
WikiSort.org - проект по пересортировке и дополнению контента Википедии