Key Map of the California Coast

The California coast is made up of Franciscan Complex rocks from the northern border down to Morro Bay and younger sedimentary rocks south of that. Exceptions to this pattern are as follows: granite makes up the rocks in and near Bodega Head, Point Reyes, Half Moon Bay and Point Lobos; and younger sedimentary rocks underlie a strip to the south of Point Arena, parts of Point Reyes, and the coast north and south of Half Moon Bay.