San Diego's First Peoples Tour Series
San Diego's First Peoples Tour Series - Geologic History: Sea to Summit: The geologic history of San Diego was dominated by the interplay of oceanic and continental tectonic plates that collided over millions of years to form a volcanic and mountainous terrain that was subsequently eroded and uplifted to expose the landscape that we see today. This tour will examine a geologic cross-section of San Diego County beginning at the coast and extending to the highest elevations of the Peninsula Range. Visits will be made to the major rock types present including coastal sediments, volcanics, metamorphic intrusives, pegmatites, and metasedimentary rocks. The use of these rock types for stone tool and pottery production will be discussed. The tour will meet at the parking lot of the Old Town Transit Center. This tour includes easy to moderate short-distance walking. Transportation and lunch will be provided.