File:Flickr - brewbooks - Shuksan Greenschist.jpg

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Formation: Shuksan Greenschist Rocktype: Greenschist / Blueschist (metamorphosed from oceanic rocks) Found: Mount Shuksan and west of Marblemount

Greenschist These rocks began to form as ocean floor volcanic rocks were forced under the continent. There, intense pressure at relatively low temperatures caused the green and blue minerals to form. Later, Shuksan Greenschists were thrust up and over younger volcanic and sedimentary rocks as the North Cascade terranes were faulted and compressed.

Source: Roadside explanatory sign, North Cascade Highway

DSCN3001
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Source Shuksan Greenschist
Author brewbooks from near Seattle, USA

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This image, originally posted to Flickr, was reviewed on 15 June 2012 by the administrator or reviewer Matanya, who confirmed that it was available on Flickr under the stated license on that date.

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current07:08, 15 June 2012Thumbnail for version as of 07:08, 15 June 20122,048 × 1,536 (1.18 MB)Matanya (talk | contribs)== {{int:filedesc}} == {{Information |Description=Formation: Shuksan Greenschist Rocktype: Greenschist / Blueschist (metamorphosed from oceanic rocks) Found: Mount Shuksan and west of Marblemount Greenschist These rocks began to form as ocean floor vo...

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