Complex sentence: Moving eastward, there is the Ventura Basin, the San Fernando Valley, and the San Gabriel Basin, with active reverse faults (San Cayetano, Red Mountain, Santa Susana, and Sierra Madre) all lining the north boundary.
Split into simpler sentences: Moving eastward, there is the Ventura Basin, the San Fernando Valley, and the San Gabriel Basin. A number of active reverse faults are present on either side, with the San Cayetano Fault, Red Mountain, Santa Susana, and the Sierra Madre Faults along the north boundary.