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 monzoniteporphyry[3] cropping out 3.5 miles (5.6 km) east-northeast (bearing 68°) of the Town of Crawford in Delta County, Colorado, United States. With 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 Oligocenegeological epoch when magmaintruded 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.
^ ab"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.
^ abNoe, 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.
^. Vancouver, Washington: USGS: Cascades Volcano Observatory (CVO). Archived from the original on 2006-09-23. Retrieved 2011-10-13.
needle, rock, natural, area, located, western, edge, west, mountains, colorado, surrounding, terrain, characterized, laccolithic, mountains, flanked, precipitous, cliffs, extensive, talus, aprons, forested, mesas, canyons, spacious, well, watered, intermontane. 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 With 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 pointElevation7 797 ft 2 377 m Coordinates38 43 28 N 107 33 00 W 38 7244335 N 107 5500571 W 38 7244335 107 5500571GeographyNeedle RockColoradoLocationDelta County Colorado U S Parent rangeWest Elk MountainsTopo mapUSGS 7 5 topographic mapCrawford ColoradoGeologyAge of rockc a 28 MaMountain typeIgneous IntrusionClimbingEasiest routerock The Needle Rock Natural Area is managed by the Bureau of Land Management 6 See also edit nbsp Geology portal nbsp Geography portal nbsp North America portal nbsp United States portal nbsp Colorado portal nbsp Mountains portal West Elk Mountains List of Colorado mountain ranges List of Colorado mountain summits List of Colorado fourteeners List of Colorado 4000 meter prominent summits List of the most prominent summits of Colorado List of Colorado county high pointsReferences edit a b Needle Rock Geographic Names Information System United States Geological Survey United States Department of the Interior a b 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 a b 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 WebpageExternal links editNeedle Rock Article summitpost org Needle Rock at Wikipedia s sister projects nbsp Definitions from Wiktionary nbsp Media from Commons nbsp News from Wikinews nbsp Quotations from Wikiquote nbsp Texts from Wikisource nbsp Textbooks from Wikibooks nbsp Resources from Wikiversity nbsp This Colorado state location article is a stub You can help Wikipedia by expanding it vte This article related to a protected area in Colorado is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Needle Rock Natural Area amp oldid 1177124055, wikipedia, wiki, book, books, library,
