I have been conducting field, geochemical, and structural studies of the lower crust of the Josephine ophiolite (location map), northern California and southern Oregon with Dr. Greg Harper, SUNY Albany. That's Greg and Celeste Thomson on the stump of a felled Giant Redwood, just west of the ophiolite. For more information on some of the field and structural aspects of the lower crust of the Josephine click on one of the following from an AGU poster:

Models for magma chambers at oceanic spreading centers

Background on the Josephine Ophiolite

Field and Structural Observations

Strain Patterns in the Lower Crust

Can Josephine tell us anything about slow to intermediate spreading centers?

For more information see:
Yoshinobu, A.S., and Harper, G.D. 2004. Hypersolidus deformation in the lower crust of the Josephine ophiolite: Evidence for kinematic decoupling between the upper and lower oceanic crust: Journal of Structural Geology, v. 26, p. 157-169.

Field shots of wehrlite/dunite bodies in the lower crust, wehrlitic and gabbroic sills in the middle crust, and hypersolidus foliations in the plutonic section of the Josephine ophioite (click on an image for a larger view).

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