The Rincon field is at the western end of the Ventura Anticline , a long narrow structure rather like the gabled roof on a long house , beneath which petroleum has collected in abundance . Two other similar onshore fields follow the anticline : the San Miguelito field to the southeast and the huge Ventura Oil Field beyond the San Miguelito , directly north of the city of Ventura . West of the Rincon field the anticline continues offshore , containing in the Carpinteria offshore field and the Dos Cuadras field , the source of the notorious 1969 oil spill . The surface geology of the Rincon field is distinctive , including some of the most landslide-prone terrain in California ; much of the surface consists of Holocene sedimentary landslide deposits , greatly prone to renewed landslides
1969 oil spill
1969 Santa Barbara oil spill
Rincon Oil Field