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From: http://www.nature.nps.gov/geology/usgsnps/province/columbiaparks.jpg
COLUMBIA PLATEAU
AND SNAKE RIVER PLAIN
From http://bprc.osu.edu/education/rr/plate_tectonics/mantle_convection_cell.gif
TYPICAL MANTLE CONVECTION
By Geoff Davies, from http://academic.emporia.edu/aberjame/student/sedlacek2/mantle.htm
MANTLE PLUME MODELS
From http://picasaweb.google.com/lh/photo/fqGljTGZRn81Z4EWaGJmgg
From: http://geology.isu.edu/Digital_Geology_Idaho/Module14/mod14.htm
From: http://www.bio.umass.edu/biology/conn.river/hitchcock.html
From: http://www.ask.com/wiki/Wave-cut_platform
Wave cut terraces demonstrate the height of Lake Bonneville in Utah
From: http://scienceblogs.com/eruptions/2010/08/back_from_the_field_and_into_a.php
Lake Bonneville shoreline terraces
From: http://iceagefloods.blogspot.com/2010/11/lake-bonneville-flood-video-new.html
Flood debris from carving canyons and alcoves
http://online.wr.usgs.gov/outreach/highlights/enlarged/king1869.html
http://explorethecanyon.com/grand-canyon-raft-tours-john-wesley-powell-adventure/
From: http://faculty.weber.edu/kmackay/four_great_surveys_of_the_west.htm
From: http://www.pbs.org/wgbh/amex/canyon/maps/index.html
“....the approach to the Shoshone. You ride upon a waste, - the pale earth stretched in desolation. Suddenly you stand upon a brink, as if the earth had yawned. Black walls flank the abyss. Deep in the bed a great river fights its way through labyrinths of blackened ruins, and plunges in foaming whiteness over a cliff of lava. You turn from the brink as from a frightful glimpse of the Inferno.”
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