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Stop 25, Emigrant Gap Vista Point: The Setting

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Stop 25 is the Emigrant Gap vista point on westbound I-80, at 39°17.958´N, 120°40.372´W. (more below)
How the Sierra unroofed
Photo (c) 2006 Andrew Alden, licensed to About.com (fair use policy)
At this stop the uplift and erosion of the Sierra Nevada is evidenced by the tilting of lava flows of the Mehrten Formation (about 5 Ma) and the removal of huge amounts of rock by erosion since the lava hardened. We also get some clues to the shape of the mountains at the time of the lavas.

Day 1, Coast Range: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9

Day 2, Sierra Nevada: 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18

Day 3, Sierra Nevada: 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28

Day 4, Coast Range: 29 | 30 | 31 | 32 | 33

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