Lowell

So, it seems subduction is the rule rather than the exception. I recall that there are old volcanoes, namely Pinnacles and the other half of that volcano down by Lancaster, as well as new volcanoes and lava fields, namely the area around Amboy crater in the Mojave. How do these volcanoes, both the ancient Pinnacles, and the recent Amboy relate to subduction and to what I perceive as a strike/slip type mechanism currently going on in Southern California? Is the volcanic activity at Mammoth related to subduction, being as far inland as it is?

Michael