FUTURE SITE OF 

 COAST RANGES 



Present coast line 



FUTURE SITE OF 

 CASCADE MT3. 

 Mt. 



Adams 



5t. Helens 

 i 



COLUMBIA PLATEAU 



Future site of Yakima and 

 Pasco basins 



LAVA 



FIELD 



Future site of 

 Lewiston Basin 



A' 



IDAHO 

 BATHOLITM 



_\ /\ /\ /N/N /_\ 

 VCA /N/N M /_\ /N / 



\ /_\VX /N /_\ /_S /_\ /_\ /_\ /_\ /V 



A >_\ /_\ /_\ /_\ /_W_\ /\ /\ /J / N / 



/\/\y\/\/\/\/\/\/\/\/~/ 



Present coast line 



FUTURE SITE JFUTURE SITE OF 

 COAST RANGES ' CASCADE MTS. 



Klamath structure 

 exposed now 



? i <n 



MALHEUR PLATEAU 



Now covered with Pliocene 

 and Pleistocene lavas 



LAVA FIELD 



Present site of 

 Steens Mt. 



B" 



TYEE . walCA* 4 * 05 



MOOK, SILETZ RIVER AND OMP° oA V ^ 



puex 



N E V ADAN 



CO w 



5CALE 



MILES 



50 



I0O 



Fig. 29.17. A-A', cross section through Washington and B-B', cross section through Oregon. For 

 positions see Fig. 29.1. They attempt to restore ideally the Eocene, Oligocene, Lower and Middle Miocene 

 sediments and volcanics just before the folding in the trough area of late Miocene time. 



15 000 FT. 

 10000 

 -5000 



150 



