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SDAG Events / Announcements

PRESIDENT'S CORNER:

Hi SDAG Members,

Welcome to 2020! Hope you all are well rested and recharged from the holidays. I want to say thanks to Mission Trails Visitor Center for hosting our January meeting and thank you to Dr. Pat Abbott for presenting and answering questions on the production of the Mission Trails Geology movie. It was an excellent and very entertaining movie. This was my first time exploring the visitor center there and I was very impressed with the scenery and displays. We are looking forward to continuing our relationship with MTVC and holding future meetings there. I also want to say thanks to all the members that attended. We had an excellent turnout of about 90 people!

Moving into the new year I would like to introduce our new officers and acknowledge Ken Haase for finishing up with his volunteer work with SDAG and successfully making it through all four officer positions. Our new officer lineup is as follows: Keith Kastama (Treasurer), Nadja Scholl (Secretary), Luke Weidman (Vice President) and Adam Avakian (President). We have a great team here and are looking forward to providing our members with lots of fun geology in 2020!

Our meeting this month will be on infiltration/percolation testing for storm water runoff mitigation for new developments. This is a very pertinent topic in the last 5 years or so as regulations and requirements for new construction projects have changed. Some of us being geotechnical consultants typically must assist with the design of these infiltration systems. So, this will be an interesting, more industry related talk. I'm also very excited to have my former coworker, Jeremy Faker giving us this presentation.

Looking forward to seeing everyone at the meeting!

-Adam Avakian
2020 SDAG President



ASCE and EERI - joint meeting 2/25/2020

ASCE and EERI will be hosting a joint lunch program on February 25th from 1130 to 1300. The talk will be given by Tony Court and is titled "M6.9 Scenario Earthquake on the Rose Canyon Fault - Is San Diego Prepared?". More information can be found here:

https://www.eventbrite.com/e/asce-february-lunch-program-joint-with-eeri-m69-scenario-earthquake-on-the-rose-canyon-fault-is-san-tickets-93559604295

National Earthquake Conference

The 2020 National Earthquake Conference (NEC) http://www.earthquakeconference.org/ will take place during the week of March 2, 2020 in San Diego and will bring together academia, building code experts, design/build professionals, FEMA directorates, first responders, geologists, local emergency managers, insurance and reinsurance professionals, local and tribal governments, private-sector interests, public information officers, state government leaders, social science practitioners, U.S. State and Territorial Earthquake Managers, USGS leadership, and volunteers. Attendees will share the latest advances in earthquake science, engineering, policy, and practice to create more resilient buildings and disaster-resilient communities in the face of seismic risk. The results of a new earthquake scenario and risk study for the San Diego region will be a key highlight of the conference. Developed by experts over the last five years, the scenario will showcase the impacts and consequences of a potential M6.9 earthquake on the Rose Canyon fault that runs through the San Diego harbor, resulting in significant disruption and loss to local communities. Participating experts will share findings from seismological and geologic simulations, engineering inventory and assessment studies, and local stakeholder focus groups.

OSW to Potato Chip Rock, Ramona

2019 SDAG Annual Field Trip - Owens Valley, CA - September 27 to 29, 2019
Trip 2019 Group Photo

Photo from - Adam Avakian SDAG 2019 Vice President

ONE-STOP WONDER CHALLENGE!
ONE OSW A MONTH IN 2020
BE A PART OF SDAG HISTORY!


Have an idea for a one-day or half-day field trip?
Want to share your favorite aspect of San Diego geology?
Contact SDAG to schedule your One-Stop Wonder!
Your OSW may be chosen to be included in SDAG's One Stop Wonder Guidebook!

Contact Monte Murbach for scheduling! montemurbach@gmail.com


In the news ...


Hint for first-time use of AmazonSmile: enter "San Diego Geological Society"
because the system will probably default to some other charity


Photo of the month CALL FOR PHOTOS!
That's right!...It's back, the SDAG monthly photo competition, featuring the very best of member photo submissions from around the County and beyond. The prize is one free drink at the next meeting, so if you're a winner, just see our resident bartender extraordinaire, Cari Gomes at the next meeting.....or myself (The Secretary) if it's not a SDAG libation supplied event.


Volcanology Speaker Wanted!

Wavelength Brewery (our last meeting venue) in Vista is looking for a geologist or volcanologist to give a voluntary talk on the recent volcanic activity going on in Hawaii. If anyone is interested in doing this please contact the brewery. Here is a link to their webpage: www.wavelengthbrewco.com

Free Back Issues of California Geology

Free back issues of California Geology will be brought forth at this month's meeting. Several years are organized in binders, going back as early as 1967! Also, some paleontology texts, yours for the taking. See Todd Wirths at the meeting. Rock on!!

John Minch book



NEW Interactive Fault Map for San Diego

As part of the update for the San DiegoTijuana Earthquake Planning Scenario, Working Group No. 1's "Fault Map Subcommittee" completed the first publicly available bi-national active and potentially active fault map (http://sandiego.eeri.org/?page_id=265). This interactive GIS map includes the first publicly available active and potentially fault map locations from the City of San Diego. The map also integrated the faults south of the border for a bi-national cross border view. This map is an on-going project as our knowledge increases about local active and potentially active faults.

You can expand the map legend on the left side to select layers that can be turned on or off for the map view. You can also select from 1 of 12 base maps at the base map icon. You can click on the fault line in your map layer view to see the meta-data source. In addition, the City of San Diego Seismic Safety Study Geologic Hazards & Faults Maps are available in the layer titled "GeoHaz SD City." Please note that the City "Zone 12 Potentially Active" fault layers was not included in this data, therefore you will need to use the City Maps to find Zone 12.

The Fault Map link is available at: http://www.sandiegogeologists.org/Faults_map.html

I would like to thank Carolyn Glockhoff for her endless GIS work, Jim Quinn and the City for providing their data and time, Jerry Treiman with CGS for his time preparing the Surface Rupture and providing their new State fault data layer, and Luis Mendoza at CICESE for providing the faults south of the border. Please contact Diane Murbach (dianemurbach@gmail.com 619-865-4333), Chair for the SDTJ Earthquake Scenario Working Group #1 - Earth Science, if you have any questions, or see any errors on this new fault map.

Diane Murbach
(619) 865-4333
Engineering Geologist, C.E.G.
www.murbachgeotech.com

CALL FOR ARTICLES! SDAG invites members to submit articles on their current research or an interesting project they are working on for publication in the monthly newsletter. The article should be no more than 1 page in length. Photos are welcomed, too! Please submit articles to the SDAG secretary via email.

The "Lindavista" Fm: Marine Terraces to Terrestrial Terraces and all Plants in Between

by Eleanora (Norrie) Robbins, PhD (USGS-retired; SDSU-retired)

I have several specialties, one of which is iron bacteria. So anytime I see red rocks I wonder if iron bacteria had a role in their formation. Recently I've been fixated on the red sandstones at the top of the cliffs at Cabrillo, Torrey Pines, Crest Canyon, and along Highway 52. Tom Rockwell teaches that these red rocks were all Pleistocene marine terraces that have been uplifted to become terrestrial terraces in the past 1.5 or so million years. He and his predecessors have mapped seven old terraces and thirteen very old terraces. In general, the red sandstones on these terraces are called "Lindavista" Fm.

If you drive to Torrey Pines, you've seen the large vertical structures that start in the Lindavista and continue down into the Torrey Sandstone. I am fascinated with Pat Abbot's hypothesis that these large structures might have been mineralized tree roots. That got me thinking about the plant communities that would have colonized the marine sediments when they were uplifted into the terrestrial environment. The first plant community growing on uplifted marine sands had to have been coastal salt marsh; then I presume fresh water marsh, forested wetland, grassland, and now the rocks are colonized by coastal sage scrub and Torrey pines. Using this as my model, I am trying to unravel the post-depositional history of these rocks.

Lithified but never buried, the "Lindavista" is cemented with iron oxide. What was the source of reduced iron that could be oxidized? My working hypothesis is that the sediments contained iron monosulfides and pyrite that formed during the marine and coastal salt marsh phases. I am thinking that with uplift, the iron sulfides were oxidized by iron bacteria to ferrihydrite. If the sediments then went through a salinity phase (i.e., sea level rise), ferrihydrite would dehydrate to hematite; but using reflected light, I rarely see hematite in any of the rocks.

Another fascinating characteristic of the "Lindavista" are Mn-rich soil concretions and nodules. In Virginia, I worked in a wetland that was actively forming these; there, iron bacteria were active in the subsurface where the concretions formed. In places, the "Lindavista" concretions form vast accumulations at the surface, where we call them rollers because they are easy to slip on (ask Joe Corones). I presume that they are residual lag deposits from sediments and rocks that have eroded away.

Thinking as a paleoecologist, I've started tromping around our coastal salt marshes: Tijuana, Sweetwater, South Bay, Los Penasquitos, and all the coastal lagoons. In these, I'm searching for sedimentary structures, distinctive shells, and sediments with iron sulfides.

There's more to the story, such as the abundance of magnetite in the rocks. The magnetite is perfectly black under the microscope, not rimmed red. I don't understand its provenance and its role. And where are the shell fossils from the marine history? The only shells that have been collected are from the base of the Lindavista, only inland, where it sits on calcareous rocks.

I've been taking the students I mentor out in the field with me, seeing if I can interest some of them in these rocks. But they need a funded professor to move forward with XRD and thin sections; I'm retired. I do welcome anyone who wants to tromp with me on the red sandstones or in the stinky marshes.


Absolution by the Sea - Now Open For Business!!
Long time SDAG member and past president, Cari Gomes, has assisted in opening a new brewery-restaurant called Absolution by the Sea, from Absolution Brewing Company. The restaurant is located at 7536 Fay Avenue, La Jolla, CA 92037. Phone 619-202-4152. Come enjoy great craft beer and food with your fellow geologists!

Looking For A Sample of Ardath Shale

I am curating an exhibit for the La Jolla Historical Society about Canyons. We would like to include a specific exhibit - a chunk of Ardath Shale. It ties in to so many of our other items: how La Jolla was formed, ecology and native plants, as well as the issue of landslides. For example, the Soledad Mountain Road slope failure of a few years ago was related to the geology: heavy soils over Ardath Shale...according to the reports I've been reading. I'd like to show our visitors what exactly Ardath Shale looks like.

Does your organization have a sample of this type of rock? If not, can you suggest where I might find a sample large enough to put on display?

Regards,
Susan Krzywicki
susankrzywicki@mac.com
www.susankrzywicki.com
(619) 318-4590
California Native Plant Society, Ocean Friendly Gardens

Yosemite Conservancy Outdoor Adventures featuring custom adventures.


Got too many rocks? Are you (or specifically, your spouse...) interested in giving them a good home *away* from your house and garden? Mesa College is looking to collect some rock samples for an inaugural Earth History course. We are specifically looking for sedimentary rocks that include examples of different energy environments (varying grain sizes and shapes) and structures (ripples, cross bedding, planar bedding, graded bedding, etc.). We are also looking to beef up our fossil collection and are looking for all the major phyla: Echinoderms, brachiopods, mollusks (bivalves, cephalopods, gastropods), arthropods (trilobites and more!), corals (Cnidaria), Porifera, Bryozoa, vertebrates (Chordata), etc. Looking for both actual standalone specimens or in the rock still (showing different environments of deposition). We are looking for fossil preservation examples, and also for good trace fossil evidence. Got any sediment grain samples from cool locales? We'll take them! If you have anything else you think provides a good 'story' in the rock, we are willing to check it out! We are collecting ASAP to assess how much needs to be ordered for the fall course. Please contact Jill Krezoski at JillKski@hotmail.com or Don Barrie at dbarrie@sdccd.edu with queries or samples.

ROCK DONATIONS NEEDED: Amy Romano, one of our former student members, is looking for rock donations. Amy is currently attending Humboldt State University and majoring in Geology. She is very involved with Humboldt's Geology Club, and every year the club holds a rock auction to support their activities. If you have any rocks to donate, please contact Amy at ajr612@humboldt.edu.

Annual Scholarship Awards by the San Diego Association of Geologists, a program of the San Diego Geological Society, Inc.

A primary function of the San Diego Association of Geologists (SDAG) is to support academic opportunities in geology and related sciences. By-laws of the San Diego Geological Society (SDGS) specify the support of academic opportunity ranging from elementary through graduate levels. The SDAG scholarship program has supported academic research in higher education by awarding scholarships annually to students from two-year and four-year undergraduate and master's level programs. Awards are for outstanding research in geology and related sciences. Nominations are solicited from individual faculty and from geology or related science departments at accredited academic institutions. Evaluation of the relative merit of each nominee is based on an abstract describing the objectives and results of the research being conducted by the student and on the letter of recommendation by the student's mentor or nominating committee.

The annual timeline is as follows:
  • Request for nominations occurs in September.
  • Nomination letters and research abstracts are received by the Scholarship Coordinator in mid to late October.
  • Awardees and their nominators are invited to attend the December SDAG dinner meeting. Scholarship awards are distributed to the student during the December meeting.
  • Students accepting awards are required to give a presentation of their research results usually at a spring dinner meeting of SDAG.
For further information contact SDGS Board at http://www.sandiegogeologicalsociety.org/contact.html through the Contact Us option

SDAG RESEARCH TOOL

A comprehensive listing of all papers published by SDAG, whether as annual field trip guidebooks or special publications, is available on our website. Entries are sorted by primary author, or chronologically by date of publication, from our first guidebook in 1972, up the San Luis Rey River in 2013, from Coast to Cactus in 2014, and finally over the edge to the Coyote Mountains in 2015. These can be accessed or downloaded as .pdf files. They are fully searchable in Adobe Reader or Acrobat, so if you are researching a topic, "tsunami" for example, you can search for that keyword. This listing will be updated as new books are published. Thanks to Greg Peterson and Hargis + Associates, Inc., for making this possible. See the links below:
SDAG publications sorted by senior author.
SDAG publications sorted chronologically.

Request for Sponsors: 2020 SDAG/SDGS and Publication SPONSORS

On behalf of the San Diego Geological Society, Inc. (SDGS), a public benefit 501(c)3 nonprofit educational corporation, we would like to request tax deductible Donations at our San Diego Association of Geologists (SDAG). The list of paid Sponsors and the forms to become a Sponsor are located on the SDAG web site at: http://www.sandiegogeologists.org/Sponsors.html.

Your donation will further the SDGS mission to promote geology and related fields in the greater San Diego region, operating through the San Diego Association of Geologists (SDAG), a committee of SDGS. To achieve our primary educational objective, we organize frequent field trips and maintain a program of monthly meetings featuring speakers on current geological topics. We also publish field trip guidebooks and other publications related to geology and natural history. We encourage scholarship and research by awarding scholarships from the elementary through graduate levels. With your $100 "EMERALD" donation, your name/business will be listed as a sponsor on the SDAG web site (http://www.sandiegogeologists.org/) and in the monthly SDAG meeting newsletters. With your $500 "RUBY" or $1,000 or more "DIAMOND" level donation, your business card will also be included on the SDAG web site and in the monthly SDAG meeting newsletters. In addition, as a "$1,000 or more DIAMOND" level donation you will be presented with a thank you plaque.

Should you have any questions regarding a Sponsorship, please contact our non-profit SDGS Secretary (Diane Murbach) at 619-865-4333.

SDGS/SDAG

As many of you are aware, the San Diego Geological Society (SDGS) was formed in early 2010 as an official non-profit 501(c)3 corporation, and SDAG is now an organization under this corporation. The reasons for doing this were many and they are spelled out in an informational sheet, the Business Plan of SDGS. The officers of SDGS should be very familiar to you, as they are all past presidents of SDAG. For those of you that would like to read more about SDGS and what it means to SDAG, check out the informational page on the website. Also check out the website www.sandiegogeologicalsociety.org.

GSA meetings

2020 GSA Annual Meeting in Montreal, Quebec, Canada


Annual Meeting 25-28 October 2020

VINTAGE SDAG GUIDEBOOKS NOW AVAILABLE FOR FREE DOWNLOAD!

If you want to complete your collection, or just see what SDAG was up to in the 1970s, check out our website's publication page, and scroll all the way down: http://www.sandiegogeologists.org/Publications.html In addition to our very first publication in 1972, a field trip to Otay Mesa, you'll find our 1973 Geology and Hazards of San Diego volume, the first of two guidebooks to the Coronado Islands, in 1978, and our 1987 field guide to the gold mines of Julian. Happy reading!

WAREHOUSE AND OFFICE SPACE AVAILABLE in El Cajon
Short-term rental or long-term lease. Warehouse from 3125 to 6250 sq. ft. Two remodeled offices. Mix and match to meet your needs. Ideal for geotech operations; best possible rates, and we are geology friendly. Contact Lowell Lindsay at Sunbelt Publications 619-258-4911 x110.

SDAG Wear - Monte (Murbach) has a variety of shirts, hats, visors and even a nice vest with the SDAG logo. A small selection is available for purchase at the meetings; all SDAG wear can be ordered from Monte.

DO YOU HAVE AN ANNOUNCEMENT?? Do you have an event, job opening, field trip or other announcement you would like to share with our members?? Just call or email our SDAG Secretary.

San Diego State University

Wednesday seminars, 1 - 2 pm, SDSU in the Chemistry-Geology Building, room CSL-422. Check http://www.geology.sdsu.edu/seminars/ for details.
Department of Geological Sciences
San Diego State University
San Diego, CA 92182-1020
FAX (619) 594-4372           VOICE (619) 594-6394
*****Parking near campus is limited. There are two lots of meters on the SE side of campus off College, for example and it would be about a 5 minute walk from there. The first lot is meters, and the deeper lot is less expensive ticket machine. *****
The Gordon Gastil Endowed Scholarship Fund continues to seek donations of any amount. Gifts of $ 500.00 or more will be recognized on a plaque to be placed in the remodeled Geology Building. Donations can be sent through SDAG, or contact Pia or Marie, Department of Geological Sciences, SDSU, at (619) 594-5586.

AAPG Student Chapter
American Association of Petroleum Geologists - San Diego State University

Jennifer Luscombe (current student M.S. student at SDSU) and the SDSU-AAPG student chapter officers are beginning the 2016/2017 academic year. Their intention is to support student interest in petroleum and geology related fields. The AAPG student officers are currently organizing an event to stockpile the students with geology supplies and funds to attend the AAPG event in Las Vegas and GSA event in Denver. Details of the event will be forthcoming.

Association for Environmental Health and Sciences


Association of Environmental and Engineering Geologists
AEG San Diego Chapter
AEG Inland Empire Chapter


Coast Geological Society


Inland Geological Society


Los Angeles Basin Geological Society

Meetings are generally held the 4th Thursday of the month at 11:30AM at the Grand at Willow (check their website http://www.labgs.org/ for their newsletter, for more details, and to make a reservation). Reservations Are Essential.

Society for Mining, Metallurgy, and Exploration, Inc.,
Southern California Mining Section


South Coast Geological Society

The SCGS usually meets on the first Monday of every month, in Orange County. For more SCGS information, visit their website at: http://www.southcoastgeo.org.


West Coast PTTC

Check the West Coast Petroleum Technology Transfer Council website http://www.pttc.org/west_coast/west_coast_home.htm/ for workshop date and location.

Our website manager, Carolyn Glockhoff, can create a link from any Corporate Sponsor's listing on the SDAG website to its company website, if one exists. Also, please send the URLs of your favorite geology sites to carolyn@caro-lion.com for listing on the Geologic Links page. These could be data resources, schools, useful government contacts, geologic software, contractors, laboratories, your own company's website, or anything you think would be useful to your colleagues.

DO YOU HAVE AN ANNOUNCEMENT?? Do you have an event, job opening, field trip or other announcement you would like to share with our members?? Just call or email Nadja Scholl - 2020 SDAG Secretary. Any news regarding upcoming events that may be of interest to the Association or news of your business can be submitted.

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