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SDAG Monthly Meeting
Wednesday - September 20

Location: Marine Room (center of MVCC)
Marina Village Conference Center
1936 Quivira Way
San Diego, CA 92109

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 - Happy Hour
7:00pm - Dinner
7:45pm - Announcements
8:00pm - Presentation and Questions


Menu: Street Tacos (steak/Chicken) and Quesadillas
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: $45.00 for non-members, $40.00 for members, $30.00 for students
Reservations: Make your reservation online by clicking the button below no later than noon, Tuesday, September 19
WALK- INS are still welcome but it might not be possible to add you to the food count.
CANCELLATIONS: If you would like to cancel, pls do so by Tuesday 9/19 AT 12 PM. Please keep in mind that we still need to pay for confirmed no shows. Fees payable at the meeting or pre-pay with PayPal.
There also will be a phone credit card reader at the meeting.


7:45pm - Announcements
8:00pm - Program

" Geology Beyond the Earth: Rocks from Space "

Speaker: Dr. Candace Kohl

ABSTRACT: Meteorites and impact events have played a crucial role in forming the earth and solar system as we know it. Except for some lunar rocks and soil, and a few other bits of material meeorites are the only samples we have in hand to study the other bodies of our planetary system. All the other information we have is from some form of remote sensing.

Meteorites are the oldest solid material we have from the formation of the solar system and tell the story of those early days in ways that no terrestrial rock can. Some of the mineral grains in these samples predate the ignition of our sun as a star and were actually formed in other stellar systems. Meteorite impact events on earth have had a huge effect on its geologic and biologic history and are still a hazard. Was the moon formed by a giant impact early in the solar system history? Was the water we have on earth brought in by meteorites? How about the earliest organic molecules that could have led to life? Were the dinosaurs killed off by an impact?

Most meteorites are from the asteroid belt and tell us about conditions in this region of space, but a few special ones are from the moon and from Mars. Since we haven't brought back any Martian samples yet, these rocks can provide a critical "ground truth" for the other observations of that planet.

Meteorites fall evenly around the world. The process of hunting for them, studying them and investigating the impact craters they produce is an exciting international endeavor.

This talk will give a general overview of meteorites and meteorite studies and there will be a number of meteorites on display for close inspection. Bring questions and curiosity. In addition, I will talk a bit about current and future sample return missions. For example, 4 days from the date of this talk (on September 24, 2023) the OSIRIS-Rex mission is due to return its collected sample from asteroid Bennu.

Dr. Candace Kohl received a BA in chemistry from Carleton College in Northfield Minnesota in 1969 and a PhD in cosmochemistry from UCSD in 1975. Her experimental work centered on measurements of cosmic ray produced radioactivity in lunar material and meteorites to investigate the constancy of the solar cosmic rays, the rates and extents of various processes on the lunar surface, and the exposure histories of meteorites. Her work lead directly to the extension of these techniques to date terrestrial landforms including obtaining the age of formation of Meteor Crater in Arizona. This technique has proved to be an important tool for the study of geomorphology and investigations of climate change. She has performed fieldwork on many of the impact structures in Australia, spent a field season hunting for meteorites on the Antarctic ice and a field season on top of the Greenland ice cap helping to obtain a 10,000-foot-long ice core.

Candace has served on a number of committees for the Meteoritical Society. She is active in science outreach, is on the board of several fund-raising organizations for science scholarships and she volunteers with international science efforts and organizations promoting women in science. Candace has been honored by the designation of Minor Planet 4899 Candace
Upcoming SDAG meetings - 2023

20 September - Student Scholarship winners


October -

Novomber -

December -

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