Radiometric dating should be what they use
This province has several subprovinces, including the active and sometimes deadly volcanoes of the Cascade Range and the young, steep mountains of the Sierra Nevada. The rocks that form the backbone of the Sierra Nevada are mostly granitic rocks that formed during the Mesozoic Era, when dinosaurs roamed the Earth.
How it will it affect things, people, communities, animals, the environment.
Is it bishop rock?
cuz thats what google says.