This is a faulted, highly volcanic are with cinder cones, lava flows, and calderas. This is the stuff that give geologists woodies.
Geologically speaking, the Mammoth Lakes/Long Valley Caldera area is young. Since the 1980’s the Mammoth Lakes area has been under the watchful eye of geologists. Ironically, the area bears a striking resemblance to the Pierce Brosnan film, Dante’s Peak in which a small town built in the shadow of a volcano was destroyed.
There’s your geology lesson for the day. Hope you enjoyed it. Happy volcano watching!