Is the san andreas fault a volcano or a transform fault?

San Andreas, California is actually a bit EAST of Stockton, California.

By accessing the "Fault Map" link provided below, you can readily see that the fault zone is actually WEST of San Francisco at that latitude.

By accessing the "Field Guide" link, you can see a VERY GOOD photo of the fault, shot from the air. Go a little further on that link to see some VERY IMPRESSIVE photos of California's biggest fault. (800+ miles in length!)