View of the western San Fernando Valley from near Mission Point. On the right in the foreground are roads of the Aliso Canyon Oil Field which is now used as a natural gas storage facility. Pore spaces in the rock that were previously filled with oil were evacuated when oil was pumped out of the Aliso Canyon Oil Field. Natural gas from various places in California is now being pumped into those pore spaces where it is stored until needed. The obvious road in the middle of the valley is Reseda Blvd. and the Santa Monica Mountains are in the background. GeoTrek IV-C began near the top of the Santa Monica Mountains near the end of Reseda Blvd.