A CONTINENTAL-OCEANIC CRUSTAL BOUNDARY IN THE PACIFIC NORTHWEST.
Final rept., Apr-Oct 65 (Scientific),
BOSTON COLL CHESTNUT HILL MASS
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A compilation of geophysical and geological data shows a consistent relationship relative to the distribution of major tectonic units in the Pacific Northwest. The Olympic-Wallowa Lineament and the Blue Mountain Front seem to represent the surface expression of deep crustal boundaries between continental and oceanic crust at least during the early half of Cenozoic time. The continental block has high average deep crustal resistivity values the oceanic, low average values. These deep crustal units are blanketed by a 10-15 km thick geophysical unit of 100-200 ohm-m resistivity. Speculations on the possiblity of continental-oceanic crustal boundaries and of fold mountains on other planets are presented. Author
- Geology, Geochemistry and Mineralogy