Coast Geological Society

Ventura, California


In the event that US 101 remains closed through Tuesday, January 16th, there is a chance our planned speaker may not be able to join us. 

In any case, we will still hold our meeting and dinner, as it is too late to make cancellations with our venue and caterer. We still encourage you to come and share a delicious meal with your fellow CGS members and hear about our upcoming plans. 

Thank you for your continued participation through this difficult season!

Please Join CGS on Tuesday January 16th, 2018

Dr. Matthew Jackson, Professor in the Department of Earth Science at UC Santa Barbara, will give his talk titled:

The fate of subducted tectonic plates and the survival of primordial reservoirs in the Earth’s deep interior

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CGS would like to thank California Environmental Geologists & Engineers, Inc. for sponsoring the January 2018 meeting!

California Environmental Geologists & Engineers, Inc., is dedicated to an integrated approach to solve the difficult groundwater and soil contamination problems. 

California Environmental has in-house and under contract a top group of geologists, engineers and chemists, and laboratories whose considerable expertise are brought to bear upon the difficult challenge: recognition and cost effective remediation of impacted soil and groundwater.

Since 1987, California Environmental has performed timely and thorough environmental investigations, primarily Phase I, II, and III studies throughout Southern California.

California Environmental has CA registered professionals on staff available to handle all aspects of Phase I, II and III investigations.

We have a stable work force. The average tenure of our employees exceeds ten years.

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Talk Abstract:

The fate of subducted tectonic plates and the survival of primordial reservoirs in the Earth’s deep interior

          The Earth’s deep interior is a dynamic environment that convects and stirs on billion-year timescales.  Plate tectonics injects altered oceanic crust, sediments, and depleted mantle lithosphere into the mantle, permitting communication between surface and deep reservoirs in the Earth. The fate of the subducted material is not known, but it constitutes a significant reservoir in the Earth’s mantle that may be sampled by buoyantly upwelling mantle plumes that source volcanic hotspots. While prospecting for geochemical signatures of ancient subducted oceanic lithosphere in hotspot lavas, fingerprints of surviving relics of the earliest history have been identified. Mantle domains sampled by these hotspot lavas date to the earliest Hadean, prior to the formation of the moon, and provide insights into the evolution of the planet.

Matthew Jackson, Ph.D.
Speaker's Bio:

Check out Dr. Jackson's website by clicking HERE 


Ph.D., Massachusetts Institute of Technology – Woods Hole Oceanographic Institution ‘Joint Program’.  Advisor: Dr. Stan Hart. Thesis committee: Stan Hart, Fred Frey, Erik Hauri, Peter Keleman, Mark Kurz, Nobu Shimizu, Ken Simms. Degree awarded February 2008


B.S., Geology, 2001, Yale University.  Graduated cum laude

Advisor:  Dr. Philip D. Ihinger


Current Position         

Professor, Department of Earth Science, UC Santa Barbara. July 2017 – Present

Dept. of Terrestrial Magnetism (Carnegie Institution of Washington) Visiting Investigator Appointment 2014 – Present


Previous Positions

Associate Professor, Department of Earth Science, UC Santa Barbara. July 2013 – June 2017.

Assistant Professor, Department of Earth Sciences, Boston University. January 2010 - June 2013.

Post-doctoral Fellow, Department of Terrestrial Magnetism, Carnegie Institution of Washington. 

      Post-doctoral mentors:  Dr. Richard Carlson, Dr. Steven Shirey, Dr. Erik Hauri. 2008 - 2009

Post-doctoral Investigator, Woods Hole Oceanographic Institution.  Post-doctoral supervisors:  Dr. John Collins and Dr. Stanley R. Hart.  Spring 2008



-Awarded “Most Inspirational Teacher” by Graduate Students of Dept. of Earth Sci. (2016 and 2017)

-Editors’ Citation for Excellence in Refereeing for Geochemistry, Geophysics, Geosystems (2016)

-Macelwane Medal–American Geophysical Union, 2015

-Fellow, American Geophysical Union, 2015

-Kuno Award–American Geophysical Union (Volcanology, Geochemistry, Petrology), 2014

-Clarke Medal–Geochemical Society, 2014

-WHOI Ruth and Paul Fye award: Graduate Student Best Paper, June 2010

-Carnegie Postdoctoral Fellowship, Carnegie Institution of Washington, 2008-2009

-Caltech O.K. Earl Postdoctoral Fellowship (declined)

-AGU Outstanding Student Paper Award, December 2005

-NSF Graduate Research Fellowship, September 2002-August 2005

-Fulbright Grant for geological study in Iceland, 2001-2002

-WHOI Deep Ocean Exploration Institute award, Samoan seismic deployment, April 2005

-WHOI Ocean Ventures Fund award, deployment of seismic stations in Samoa, March 2005

-WHOI Coastal Ocean Institute award for geologic fieldwork in Samoa, June 2006

-Yale Geology & Geophysics Dept. Belknap Prize for achievement in the geology major, May 2000

-Yale Geology & Geophysics Dept. Hammer Prize for Senior Thesis Presentation, May 2000

Photo Credit: Anna Maria Skuladottir (

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