Page "Long Valley Caldera" Paragraph 3

Near the center of the caldera there is a mound called the " resurgent dome " that was formed by magmatic uplift.

Though the area is still volcanically active, the caldera itself is extinct: seismic mapping has shown the magma body deep underground is mostly crystallized and not molten anymore.

There is a hydrothermal power plant near the resurgent dome.

The Bishop tuff is the oldest normally magnetized tuff ( that is, it was formed when the Earth's magnetic north was near the north pole – as it is today ).

In the geologic past, water gathered in the Long Valley caldera and overtopped its rim, forming the Owens River Gorge.