The picture above shows our tour of a section of the pillow basalts and ribbon cherts of the Franciscan melange exposed in the Estero Bluffs just west of Cayucos. The chert is the reddish rock along the lower cliffs, and the pillow basalts are the grayer rocks lying above. The terrace above is a former wave-cut platform that was uplifted in Pleistocene/Holocene time. Numerous former sea stacks are exposed along the terrace surface.
The guidebook for the trip includes two extensive road guides:
- Geology of the Big Sur Coast by Mihal Ducea (pages 1-42)
- Geology of Estero Bay, San Luis Opisbo County, California (pages 43-54)