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SDAG monthly meeting
Wednesday - October 15


Location: Catalina Room (south end of MVCC)
Marina Village Conference Center
1936 Quivira Way
San Diego, CA 92109


Directions:
FROM INTERSTATE 5: Take the SEA WORLD DRIVE exit. From SEA WORLD DRIVE, take WEST MISSION BAY DRIVE on your right. When you see the large green sign that says QUIVIRA ROAD, get in the farthest left of the two left turn lanes. Turn left, go one very short block and turn left again. Drive about one half mile and MARINA VILLAGE will be on your right.

FROM INTERSTATE 8:Exit at SPORTS ARENA BLVD., then take WEST MISSION BAY DRIVE exit to the right. You will be on INGRAHAM STREET for a short distance from which you will take the next exit marked WEST MISSION BAY DRIVE on your right. When you see the large green sign that says QUIVIRA ROAD, get in the farthest left of the two left turn lanes. Turn left, go one very short block and turn left again. Drive about 1/2 mile and MARINA VILLAGE will be on your right.


happy hour
6:00pm -
Social hour  

SDAG Monthly Meeting

6:00pm - Social Hour
7:00pm - Dinner
8:00pm - Program


dinner
7:00pm

Menu: Buffet (includes Pot Roast, Chicken Parmesan, and vegetarian options) sides include garden salad, sweet cream mashed potatoes, grilled vegetables, rolls, & dessert

if pre-registered by the deadline, $5 extra if you did not make a reservation. Click the SDAG member checkbox on the reservation form if you are a member.

Cost: $ 55.00 Member; Non-Member $ 65.00; Student $ 25.00
Reservations: Make/Pay your reservation online by clicking the button below by 6:00pm Wednesday, October 8
RESERVATIONS CANNOT BE ACCEPTED AFTER by 6pm Wednesday, October 8
(Please note beginning January 2024 all meeting reservations will require on-line pre-payment due to venue costs, venue contracts, and loss of money due to no shows.)


IF YOU DO NOT PRE-PAY YOUR FOOD RESERVATION, WE CANNOT GUARANTEE YOU A MEAL.

speaker
8:00pm - Program

"Eocene Paleontology at Tourmaline Surfing Park, La Jolla"

Todd Wirths

Speaker: Todd Wirths

This talk will expand on my recently published abstract, "First report of Megafossils from the Tourmaline Surfing Park Outcrop of the Eocene Mount Soledad Formation, La Jolla, California," which can be seen here and here. In summary, matrix impressions of the fossil shells of middle Eocene marine mollusks, crustaceans, echinoderms, and polychaete worms were discovered during mitigation activities for the construction of two residences along the coastal bluff in southern La Jolla. A "Domengine" provincial molluscan "stage" (late early Eocene – early middle Eocene) is assignable to the fauna based on the restricted stratigraphic ranges of key bivalve species. The composition of the fauna, in conjunction with a continental slope depositional setting, suggests the sediments of the Tourmaline Surfing Park outcrop of the Mount Soledad Formation are probably coeval with the continental shelf deposits of the early middle Eocene Ardath Shale. I'll also review the history of the geological and paleontological research at the outcrop, and take a deep dive into some decades-old biochronologic studies that may raise some eyebrows.

Todd Wirths has been employed as a consulting paleontologist for over 15 years, including 6 as the principal paleontologist at BFSA Environmental Services, based in Poway, California. Prior to paleontology, Todd was a senior project geologist in Southern California and San Diego environmental engineering firms. Todd holds a B.A. degree from UC Santa Cruz, and an M.S. from SDSU, all in geology. Todd has been a California professional geologist (P.G.) for over 20 years. He was the president of SDAG back in 2012, and has been a member of the S.D. Geological Society board of directors since 2019. His SDAG book was entitled "Picacho and the Cargo Muchachos: Gold, Guns, and Geology of Eastern Imperial County, California." Todd's gorgeous wife Izzy Tihanyi is founder and co-owner of Surf Diva Surf School in La Jolla, CA, and their daughter Annabelle is a state finalist in competitive surfing on the La Jolla High School surf team, so it's a busy life indeed!
Upcoming SDAG meetings - 2025

September 26-28 - SDAG Annual Field Trip, San Andreas Fault in the Wrightwood area, Transverse Ranges (no meeting this month)

October 15 - Todd Wirth on "First report of marine invertebrate megafossils from the Eocene Mount Soledad Fm at Tourmaline Surfing Park" - Marina Village Catalina Room

November 19 - Joint Meeting with AEG Inland Empire Section - Eldon Gath on "San Joaquin Hills, Santa Ana Mountains, Puente Hills, and the Whittier fault: The final(?) grand theory of Orange County's tectonic geomorphic evolution" - Old Spaghetti Factory, San Marcos

December 17 - Traditional Holiday Celebration at the San Diego Natural History Museum with Tom Deméré

Recordings of past meetings

Note: If the video or sound does not play, try using another web browser. Firefox and Chrome may work on some of the videos. MS Edge and Safari are most likely to work.

8/20/2025 Dr. Mario Caputo on "Newly Discovered Tetrapod Bones, Insect Trace Fossils, & Eolian Adhesion Structures- Upper Pennsylvanian Wescogame Formation, Supai Group, Grand Canyon, Arizona"

7/16/2025 Rachel Maxwell on a survey of the Mojave-Sonoran Desert Springs and their sources. "Is this spring connected to that Aquifer?"

6/18/2025 Development of the western Hollywood Basin and Cheviot Hills, and newly identified blind thrust in Santa Monica Bay - Dr. Miles Kenney

5/14/2025 Landslide Stabilization - Dr. Sebastian Lobo-Guerrero (Audio is very quiet first few minutes.)

4/16/2025 Constraining Natural and Anthropogenic Controls on Base of Freshwater and Underground Source of Drinking Water (USDW) In Central San Joaquin Valley - Emily Imperato

4/16/2025 Examination of Middle Cambrian hyoliths from the Manuels River Formation of Avalonian southeastern Newfoundland - Nicolas Oliver

2/19/2025 A New Seismotectonic Framework for Active Faults in Metropolitan San Diego - Karl Mueller

8/21/2024 Upper Cretaceous through lower Eocene strata in San Diego: Messages for the end-Cretaceous impact, extinctions, and paleoclimates - Dr. Pat Abbott

5/15/2024 Exploring Iceland's Geological Wonders: From a Regional Perspective to a Hiking Expedition - Don Barrie & William Buckley

3/19/2024 Mighty Bad Land: A Perilous Expedition to Antarctica Reveals Clues to an Eighth Continent - Bruce Luyendyk


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