Dutsen Ruby (Washington)

**Dutsen Ruby** Dutsen Ruby sanannen taron tsaunuka ne mai tsawon ƙafa 7,412 (mita 2,259) wanda ke cikin Arewacin Cascades Range na jihar Washington.  Tana cikin Yankin Nishaɗi na Ƙasar Lake na Ross wanda ke wani yanki ne na Cibiyar Gidan shakatawa ta Arewa Cascades.  Kogin Diablo Overlook tare da Arewacin Cascades Highway yana ƙarƙashin dutsen.  Mafi girma mafi kusa shine Kololuwar Mulki, mil 4.2 (kilomita 6.8) zuwa kudu maso yamma.[1]  Ruwan ruwan sama a gefen gabas na dutsen yana magudanar ruwa zuwa tafkin Ross ta hanyar Ruby Creek, yayin da gefen yammacin dutsen ya gangaro zuwa tafkin Diablo ta hanyar Thunder Creek.  Taimakon yanayi yana da mahimmanci yayin da taron ya tashi ƙafa 6,200 (mita 1,900) sama da tafkin Diablo a cikin kusan mil biyu.

## Tarihi
Ana kiran sunan Ruby Mountain tare da haɗin gwiwar Ruby Creek.  Dutsen ya tashi sama da haɗuwar Ruby Creek da Kogin Skagit.  Al'adar gida ta nuna cewa a cikin 1872, mazauna John Sutter, George Sanger, da John Rowley sun haura kogin Skagit suka isa Ruby Creek.  Sutter ya sami ruby a rafin, don haka ya ba shi suna.

hawan farko na taron ya faru ne daga mai kula da gandun daji Tommy Thompson a shekarar 1916. 

## Yanayi
Dutsen Ruby yana cikin yankin yanayin yanayi na tekun yammacin tekun na yammacin Arewacin Amurka.  Yanayin yanayin da ya samo asali daga Tekun Pasifik yana tafiya arewa maso gabas zuwa tsaunukan Cascade.  Yayin da gaba-gaba ke tunkarar Arewacin Cascades, kololuwar Cascade Range (orographic lift) na tilasta musu zuwa sama, yana sa su sauke damshinsu ta hanyar ruwan sama ko dusar ƙanƙara a kan Cascades.  Sakamakon haka, gefen yamma na Arewacin Cascades yana samun hazo mai yawa, musamman a lokacin watannin hunturu a cikin yanayin dusar ƙanƙara.  Saboda tasirin teku, dusar ƙanƙara takan zama jika da nauyi, wanda ke haifar da babban haɗari a cikin watanni na hunturu, yanayi yawanci yakan kasance gajimare, amma saboda tsarin matsin lamba akan Tekun Pasifik wanda ke ƙaruwa a cikin watannin bazara, sau da yawa ana samun ƙananan ko babu gajimare a lokacin bazara.  Saboda yanayin yanayinsa da kusancinsa zuwa Tekun Fasifik, yankunan yamma da Cascade Crest ba safai suke fuskantar yanayin zafi ƙasa 0 °F (-18 °C) ko sama da 80 °F (27 °C). 

Arewacin Cascades yana fasalta wasu daga cikin mafi ƙasƙanci mafi ƙasƙanci a cikin Cascade Range tare da manyan kololuwa, tudu, da kwaruruka masu zurfi na dusar ƙanƙara.  Abubuwan da ke faruwa shekaru da yawa da suka gabata sun haifar da yanayin yanayi daban-daban da sauye-sauye masu tsayi a kan Ramin Cascade wanda ke haifar da bambance-bambancen yanayi daban-daban.  Wadannan bambance-bambancen yanayi suna haifar da nau'in ciyayi iri-iri da ke ma'anar yanayin da ke cikin wannan yanki.

Tarihin kafa Dutsen Cascade ya samo asali ne daga miliyoyin shekaru da suka gabata zuwa ƙarshen Eocene Epoch .  Tare da Farantin Arewacin Amurka da ke mamaye Farantin Pacific, abubuwan da suka faru na aikin wuta na dutsen wuta sun ci gaba. Bugu da kari, ƙananan raguwa na lithosphere na teku da na nahiyar da ake kira terranes sun halicci Arewacin Cascades kimanin shekaru miliyan 50 da suka gabata.

A lokacin Pleistocene wanda ya samo asali sama da shekaru miliyan biyu da suka gabata, ƙanƙara da ke ci gaba da komawa baya akai-akai sun share shimfidar wuri inda suka bar ajiyar tarkace. Yankin giciye mai siffar U na kwarin kogi shine sakamakon glaciation na baya-bayan nan. Uplift da faulting a hade tare da glaciation sun kasance manyan matakai waɗanda suka haifar da tsaunuka masu tsawo da kwari masu zurfi na yankin Arewacin Cascades.
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