SAN DIEGO ASSOCIATION OF GEOLOGISTS

Engineering and Coastal Geology of
Southwestern San Diego County
September 15 - 16, 2001

Day 1 The September Field Trip was Great! The field trip focused on examples of engineering geology in San Diego County, including faults, very large landslides and lateral spreading in the Otay Formation, and other unique features of our region. Mining techniques were described at the Otay Rock Quarry and we were able to get up close and personal with the mining equipment. Alan Pace gave us all a chance to go back to college and see the excavation work being done to support the SDSU Trolley Tunnel. Many of us were about "medium well" by then (it was hot) so the Lake Jennings Campground was a welcome relief and it has a view of the Herring Ranch for you equestrians out there. Okay, I missed the next day but included were Sunset Cliffs and coastal bluff issues. A photo soon to be included in the Field Trip section shows Walt Crampton discussing coastal bluff retreat as it relates to the various characteristics of the coastal abrasion platform. Thanks very much to Bob Stroh for organizing the event, our local experts for sharing details of their engineering geology projects, and everyone who attended. You all helped to make this year's field trip interesting and enjoyable.
Group photo at San Ysidro		Mike Hart and helpers at San Ysidro
Basal rupture surface of landslide in San Ysidro		Rock Mountain Quarry
SDSU Trolley Stop		End of day at Lake Jennings Campground
Time for refreshments at camp		David Schug giving a presentation after dinner
Day 2
Field Trip Group at Scripps Pier		Walt Crampton at Scripps Pier
Southwest Fisheries Building		Torrey Pines Cliffs
View North of Pescadero Seawall		Various methods of Bluff Stabilization
Info on the Field Guide The coastal geology of San Diego is explored in this guidebook, published for the San Diego Association of Geologists (SDAG) 2001 annual field trip under the supervision of Robert C. Stroh. Self-guiding road logs range throughout the coastal plain from San Ysidro to Sunset Cliffs/Point Loma via Otay Mesa, SDSU, Lake Jennings, Black Mountain, and the Torrey Pines/La Jolla coastline. Technical papers focus on coastal processes and engineering geology including landslides, beach erosion and bluff retreat, stratigraphy of western San Diego County, and geotechnical issues in the Peninsular Ranges.