(Deep Sea Drilling Ship Visits San Francisco)
The Joint Oceanographic Institutions for Deep Earth Sampling (JOIDES) drilling ship Resolution inside S.F. Bay, hydrothermally altered chert exposure in the foreground, Alcatraz, Treasure Island, and the Bay Bridge in the distance.
The Resolution under the Golden Gate Bridge.
The Resolution
in the Golden Gate Channel starting Leg
168 to the Juan DeFuca Ridge(
tectonic setting map) to continue drilling in active spreading centers.
Article on the evidence for vulcanism on the Juan DeFuca Ridge.
The rock in the foreground is a manganese-rich rock found in the boundary between pillow lavas and radiolarian cherts in the Marin Headlands and thought to have been formed at such a boundary.
