Dutsen Powell (California)

Dutsen Powell babban koli ne  wanda ke kan ƙwanƙolin tsaunin Sierra Nevada a California, Amurka.  Yana kan iyakar da aka raba na gandun daji na King Canyon tare da John Muir Wilderness, kuma tare da kan iyakar Fresno County tare da gundumar Inyo . Hakanan yana da  yamma da al'ummar Big Pine, da  yamma da Dutsen Thompson, wanda shine makwabcin mafi kusa.  Dutsen Powell yana matsayi na 81st mafi girma a California,  da kuma 10th mafi girma na Yankin Juyin Halitta na Saliyo Nevada.  Babban koli na yamma ba a san shi ba da sunan "Point John." R. J. Secor, The High Sierra Peaks, Passes, Trails, 2009, Third Edition, Mountaineers Books, , page 290. Wasu kololuwa biyu akan dutsen ana kiransu da sunan "Point Wesley" (13,356) ft) a tsakiya,  da "Point Powell" (13,360+ ft) mil rabi zuwa gabas. 

 Tarihi 
An kira wannan dutsen a cikin 1911 ta Robert B. Marshall, babban masanin tarihin USGS, don tunawa da John Wesley Powell (1834-1902), masanin ilimin geologist, mai bincike, mai yin taswira, mai bincike, da kuma darektan Cibiyar Nazarin Yanayin Kasa ta Amurka daga 1881 zuwa 1894.   An fara hawan 1 na farko na L5. Huber da James Rennie, biyu daga cikin manyan masu hawan dutse na Saliyo, tare da Huber yana aiki a matsayin shugaban kulab daga 1925 zuwa 1927.  A cikin 1983 Hukumar Amurka akan Sunayen Geographic sun sake sake fasalin wurin taron kolin daga Point Wesley zuwa Point John. 

 Hawa 
Kafa hanyoyin hawa kan Dutsen Powell: 

 Kudu plateau – class 3 – 1925 na Walter L. Huber, James Rennie
 Arewa maso yamma - aji na 3 - Yuni 29, 1931 na Norman Clyde
 Gabas ridge - aji 3 - Norman Clyde
 Fuskar Arewa-arewa maso yamma – aji 3 – Agusta 27, 1967 na Andy Smatko + 17 wasu R. J. Secor, The High Sierra Peaks, Passes, Trails, 2009, Third Edition, Mountaineers Books, ISBN 9781594857386, page 290.

 Yanayi 
Dangane da tsarin rarraba yanayi na Köppen, Dutsen Powell yana cikin yankin yanayi mai tsayi .  Mafi yawan yanayin yanayi sun samo asali ne daga Tekun Pasifik, kuma suna tafiya gabas zuwa tsaunukan Saliyo. Yayin da gabas ta gabatowa, kololuwar kan tilasta su zuwa sama, yana sa su sauke damshinsu a matsayin ruwan sama ko dusar ƙanƙara a kan kewayo ( ɗaga orographic ). Ruwan hazo daga wannan dutsen yana magudawa kudu zuwa Kogin Fork na Tsakiya, da arewa zuwa Bishop Creek . Taswirori daga shekarun 1980 sun nuna Powell Glacier da aka zana a arewacin tsaunin, duk da haka hotunan tauraron dan adam sun nuna cewa dusar kankara ta bace tun daga lokacin, sakamakon sauyin yanayi .

 Manazarta