Transcript Slide 1 Slide 2 Slide 3 Slide 4 Slide 5

Slide 1
Slide 2
Slide 3
Slide 4
Slide 5
Slide 6
Slide 7
Slide 8
Generalized Geology
of the Willamette Valley
Willamette Silt
P
Alluvium and basin-fill
sediment
Columbia River Basalt Gp
S
C
Gannett &
Caldwell, 1998
E
Slide 9
Marine sedimentary rocks
And Cascade Range rocks
0
10
20
30 MILES
Slide 10
Slide 11
Slide 12
Slide 13
The Missoula Floods
- 15-12ka
- perhaps 100 floods
- 500 mi3 of water, 40 hrs.
- 50 million cfs (3500 CR)
Jim O’Connor, 2003
Slide 14
Missoula Flood Deposits
Jim O’Connor, 2003
Up to 30 m thick in the northern valley.
Deposited in as many as 40 beds up to
2 m thick.
Deposited between 15-12 ka.
Contains ice-rafted erratics.
Slide 15
Slide 16
Slide 17
Slide 18
Slide 19
Slide 20
Slide 21
Slide 22
Slide 23
Slide 24
Slide 25