CentralOregonGeoscienceSocietyfiles.sitebuilder.name.tools/d4/80/d4807247-5dd9... · Basalt &...
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A roadside view of Oregon and Washington geology Assembling the Northwest: Marli B. Miller Dept. of Earth Sciences University of Oregon Central Oregon Geoscience Society Note: Due to file size limitations on the COGS website, this slide set has been reduced in length and some images have been compressed.
Transcript of CentralOregonGeoscienceSocietyfiles.sitebuilder.name.tools/d4/80/d4807247-5dd9... · Basalt &...
A roadside view of Oregon and Washington geology
Assembling the Northwest:
Marli B. Miller Dept. of Earth Sciences University of Oregon
Central Oregon Geoscience Society
Note: Due to file size limitations on the COGS website, this slide set has been reduced in length and some images have been compressed.
Beach'4'
sandstone*
shale*
limestone*
Sawtooth Peak, elev 9179
Driving'east'on'I.84'
Driving'east'on'WA.14'
Area*>*77,000*square*miles*Volume*>*52,000*cubic*miles**17?6*Ma,*94%*by*14.5*Ma*
Followed"path"of"the""Ancestral"Columbia"River"
Multnomah*Falls*Drops'620'feet'in'two'falls'over'flows'of'Grande'Ronde'Basalt'of'the'Columbia'River'Basalt'Group'
Early"Columbia"River"Gravels"
Wanupum'Basalt'Wanupum*Basalt*
16'–'15.6'Ma'Grande*Ronde*Basalt*
15.6'–'15'Ma'
Eagle'Creek'Fm'
Maximum*flood*crest*nearly*100’*above*Vista*House*
