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SDAG Monthly Meeting
Wednesday, February 20, 2019


Location: Catalina Room (southern 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
5:30pm -
Social hour  
map
Menu: Traditional Buffet - Chicken, Beef, Grilled Vegetables, Caesar Salad, Scalloped Potatoes, Bread Rolls, and Chocolate Truffle Cake. Cash Bar - Walawender Tavern
dinner
6:00pm -
Dinner


Cost: $35.00 for non-members, $30.00 for members, $20.00 for students.
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.

Reservations: Make your reservation online by clicking the button below no later than NOON, Monday, Febuary 18
RESERVATIONS CANNOT BE ACCEPTED AFTER Monday at noon.
Late reservations/cancellations are preferred over walk-ins or no-shows. Fees payable at the meeting or pre-pay with PayPal.
As a new payment option, there will be a phone credit card reader at the meeting.

IF YOU DO NOT MAKE A RESERVATION, WE CANNOT GUARANTEE YOU A MEAL.
 
If you are a current SDAG member and are not getting e-mail announcements,
make sure the SDAG secretary has your correct e-mail address.

speaker
7:00pm - 8:00pm
Program

"EARLY HISTORY OF THE YELLOWSTONE HOTSPOT TRACK AND ITS INTERACTION WITH THE SUBDUCTING FARALLON SLAB"

Speaker: Dr. Vic Camp

Abstract: In this talk, I will discuss how the Yellowstone hotspot was manifested in eastern Oregon in late Oligocene to early Miocene time, before generation of the Columbia River flood basalts and the Snake River Plain hotspot track. Integrated data reveal a broadening of the southern segment of the ancestral Cascades arc into the Oregon back-arc region from 30-20 Ma where volcanism was derived from melting of a hydrated mantle enriched in the water-soluble elements. This broadening event is attributed to thermal uplift of the Farallon slab by the underlying Yellowstone plume, with heat diffusion, decompression and the release of volatiles promoting high-K calc-alkaline volcanism throughout the Oregon back-arc region. Several of the 30-20 Ma outcrops in the Oregon-Nevada border region are dominated by unusual rocks called adakites derived from the melting of oceanic crust or equivalent rock types. These define a broad area of northeast trend parallel to plate motion which we consider to be an older extension of the Yellowstone-Snake River Plain hotspot track, where melting of oceanic crust was a consequence of slab breakup. Slab uplift and the cessation of corner flow resulted in a volcanic hiatus from ~20 to 16.7 Ma with coeval rupture of the uplifted slab in two separate places. The eastern rupture resulted in the eruption of early flood basalts derived from the ascent of a dry mantle-plume source. The western rupture resulted in the contemporaneous rejuvenation of high-K calc-alkaline volcanism due to renewed subduction and melting of a wet mantle source restricted to the Nevada-California border region. The southern segment of the ancestral Cascades arc has since migrated to the west at 7.8 km/m.y. Destruction of the slab is evident today in the seismic resolution of a slab hole beneath southern Oregon bound on the south by the Yellowstone adakite hotspot track.

Dr. Vic Camp grew up in West Virginia where he attended Marshall University (B.S.), followed by graduate studies at Miami University (M.S.) and Washington State University (Ph.D.). His research interests are in geologic mapping, volcanology, igneous petrology, and the tectonic evolution of volcanic terrains. After 10 years of research experience in Africa and the Middle East, he moved back to the U.S. and began teaching San Diego State University in 1993 where he has taught a variety of courses from General Education to hard-rock courses for undergraduate and graduate majors. His current research focus is on mid-Miocene volcanism and related tectonic evolution in the Pacific Northwest.


Upcoming SDAG meetings - 2019

March 20: Best Western Seven Seas - Matthew Weingarten - TBD

April 17: Geocon Inc. - Student Presentations

May: TBD

Meetings are usually scheduled for the 3rd Wednesday evening of the month. Meeting information on this website is normally updated the second week of the month.

If you have any information, announcements, ads or suggestions for an upcoming newsletter, please submit it to Heather Reynolds, (2019 SDAG Secretary). Any news regarding upcoming events that may be of interest to the Association or news of your business can be submitted. The submittal deadline for the next SDAG newsletter is the last Friday of the month.
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