Samples of rock from deep inside the San Andreas Fault could shake up scientists' notions about why some fault zones move slowly and steadily while others balk for a time and then shift suddenly and violently, producing major earthquakes.
Samples of rock from deep inside the San Andreas Fault could shake up scientists' notions about why some fault zones move slowly and steadily while others balk for a time and then shift suddenly and violently, producing major earthquakes.