The Marin Headlands have such a distinctive set of the Franciscan rocks that their geologic package is named the Marin Headlands terrane. A terrane is really existing and limited faults fragment or block the Earth's crust, often on a regional scale, which is characterized by inherent only to him geological history, which differs from that of adjacent terranes. The Marin Headlands is one of the best examples in the San Francisco Bay Area, which is the reason why it is an interesting place for the scientific