Northern California Geological Society
@norcalgeolsoc.bsky.social
We meet monthly in Orinda. We sponsor field trips. We award $2000 grants to grad students every year. Founded in 1944. Dues $25/yr cheap comes with e-newsletter. New blood welcome. ncgeolsoc.org (account run by @geology)
We are looking for students interested in speaking to our January 28 meeting (25 min w/Q&A). If you've got a talk in you, let us know this coming week (DM for deets)
November 10, 2025 at 12:53 AM
We are looking for students interested in speaking to our January 28 meeting (25 min w/Q&A). If you've got a talk in you, let us know this coming week (DM for deets)
Any of you feel this? At least one NCGS member did and filed a report.
I did not feel this or the M3.7 a bit later, but I was in the east bay working outside. A reminder that despite the federal government shutdown, a group of dedicated scientists at the USGS works to maintain networks that monitor earthquakes and other hazards. earthquake.usgs.gov/earthquakes/...
November 10, 2025 at 12:17 AM
Any of you feel this? At least one NCGS member did and filed a report.
Reposted by Northern California Geological Society
Del Puerto Cyn in CA's Coast Ranges is threatened by a useless dam. Here's how it looked yesterday. A precious place. #savedelpuerto
October 26, 2025 at 6:35 PM
Del Puerto Cyn in CA's Coast Ranges is threatened by a useless dam. Here's how it looked yesterday. A precious place. #savedelpuerto
Applications are being accepted now for the NCGS 2025-26 Richard Chambers Memorial Scholarship. These $2000 awards go to graduate students to support geological research projects in/near Northern California. More info and application form on the Scholarships page. ncgeolsoc.org/scholarships/
Scholarships
NCGS Richard Chambers Memorial Scholarships Recipients of the Richard Chambers Memorial Scholarship are chosen from graduate-level applicants who submit an application that describes their proposed…
ncgeolsoc.org
October 12, 2025 at 3:06 AM
Applications are being accepted now for the NCGS 2025-26 Richard Chambers Memorial Scholarship. These $2000 awards go to graduate students to support geological research projects in/near Northern California. More info and application form on the Scholarships page. ncgeolsoc.org/scholarships/
Reposted by Northern California Geological Society
After liking this post and reading the linked paper, I was keen to see if I'm missing these features in outcrops. Tooling around some basalt flows along Kona Coast in Hawaii today (Shoreline Park, just west of Kealakekua)...well, yep! Will be keeping my eye peeled for these in older flows in AZ!
October 6, 2025 at 6:48 AM
After liking this post and reading the linked paper, I was keen to see if I'm missing these features in outcrops. Tooling around some basalt flows along Kona Coast in Hawaii today (Shoreline Park, just west of Kealakekua)...well, yep! Will be keeping my eye peeled for these in older flows in AZ!
Was a lively talk Wednesday by UC Berkeley's Lung Chan on his "natural explosion structures" -- see the paper in J. Struc. Geol. at www.sciencedirect.com/science/arti...
September 26, 2025 at 6:00 PM
Was a lively talk Wednesday by UC Berkeley's Lung Chan on his "natural explosion structures" -- see the paper in J. Struc. Geol. at www.sciencedirect.com/science/arti...
Pioneering engineering geologist J. David Rogers has died. When he lived in the Bay area he contributed to NCGS events.
Dr. J. David Rogers
Dr. J. David Rogers passed away on August 23, 2025, surrounded by his family and prepared to meet his Savior and Lord Jesus Christ. A popular retired Missouri University of
www.phelpscountyfocus.com
September 3, 2025 at 6:59 PM
Pioneering engineering geologist J. David Rogers has died. When he lived in the Bay area he contributed to NCGS events.
September! Our first meeting of the 2025-26 season comes up on the 24th. Why not join us?
September 2, 2025 at 3:00 AM
September! Our first meeting of the 2025-26 season comes up on the 24th. Why not join us?
Reposted by Northern California Geological Society
THE PLANE THAT’S COLLECTING ALL NEW LOW TIDE LIDAR FOR THE SAN FRANCISCO ESTUARY WETLANDS REGIONAL MONITORING PROGRAM IS IN THE AIR!!!
August 20, 2025 at 9:08 PM
THE PLANE THAT’S COLLECTING ALL NEW LOW TIDE LIDAR FOR THE SAN FRANCISCO ESTUARY WETLANDS REGIONAL MONITORING PROGRAM IS IN THE AIR!!!
Hey everybody! @drjuliawester.bsky.social and I have a new paper!
We surveyed over 800 scientists, science communicators, and science educators who use social media.
Conclusion: Scientists no longer find Twitter useful or pleasant, and many have switched to Bluesky! 🧪🌎🦑
doi.org/10.1093/icb/...
We surveyed over 800 scientists, science communicators, and science educators who use social media.
Conclusion: Scientists no longer find Twitter useful or pleasant, and many have switched to Bluesky! 🧪🌎🦑
doi.org/10.1093/icb/...
Scientists no Longer Find Twitter Professionally Useful, and have Switched to Bluesky
Synopsis. Social media has become widely used by the scientific community for a variety of professional uses, including networking and public outreach. For
doi.org
August 20, 2025 at 6:53 PM
Reposted by Northern California Geological Society
This is horrifying and yet another reminder of why we can't abandon fossil fuels quickly enough.
The Elwha River is a triumph of restoration, with salmon returning after over a century's absence since major dam removals 12 years ago. The spill is on a tributary 1.5 miles from the river's main stem.
The Elwha River is a triumph of restoration, with salmon returning after over a century's absence since major dam removals 12 years ago. The spill is on a tributary 1.5 miles from the river's main stem.
A fuel tanker crashed off Highway 101 on Friday and began leaking fuel into a major tributary for salmon, trout and the water supply for Port Angeles. It's a pretty devastating spill.
From @isabellabreda.bsky.social and me: www.seattletimes.com/seattle-news...
From @isabellabreda.bsky.social and me: www.seattletimes.com/seattle-news...
Tanker crashes, spills fuel into Elwha tributary near Port Angeles
A fuel tanker truck went off Highway 101 into Indian Creek, a tributary of the Elwha River, on Friday morning.
www.seattletimes.com
July 19, 2025 at 12:45 AM
This is horrifying and yet another reminder of why we can't abandon fossil fuels quickly enough.
The Elwha River is a triumph of restoration, with salmon returning after over a century's absence since major dam removals 12 years ago. The spill is on a tributary 1.5 miles from the river's main stem.
The Elwha River is a triumph of restoration, with salmon returning after over a century's absence since major dam removals 12 years ago. The spill is on a tributary 1.5 miles from the river's main stem.
NCGS member Gary Prost has a book coming out!
July 8, 2025 at 8:22 PM
NCGS member Gary Prost has a book coming out!
NCGS member and webmaster
New blog post: The Concord fault isn't where we thought.
Concord fault update 2025
When I wrote about the Concord fault last year, I showed places where the fault is easy to see by the way it pulls apart street curbs and makes cracks in paved areas. I stayed in the northern part …
oaklandgeology.com
July 7, 2025 at 10:50 PM
NCGS member and webmaster
Reposted by Northern California Geological Society
Great new open access paper - “Newly Identified Creeping Strand of the Concord Fault, San Francisco Bay Area”.
I was able to go check out the area with the authors last summer. Super neat!
Link - pubs.geoscienceworld.org/ssa/srl/arti...
I was able to go check out the area with the authors last summer. Super neat!
Link - pubs.geoscienceworld.org/ssa/srl/arti...
July 7, 2025 at 6:55 PM
Great new open access paper - “Newly Identified Creeping Strand of the Concord Fault, San Francisco Bay Area”.
I was able to go check out the area with the authors last summer. Super neat!
Link - pubs.geoscienceworld.org/ssa/srl/arti...
I was able to go check out the area with the authors last summer. Super neat!
Link - pubs.geoscienceworld.org/ssa/srl/arti...
In Harpers, a well-sourced (Lyell and Darwin) meditation on geological deep time vs human time. archive.ph/lpruL
archive.ph
June 24, 2025 at 8:39 PM
In Harpers, a well-sourced (Lyell and Darwin) meditation on geological deep time vs human time. archive.ph/lpruL
Our 2009 Gold Country field trip passed the rock shop west of Mariposa, where the field trip leader said he'd found a small gold nugget in the roadcut to the east. A recent visitor found no gold but lots of beautiful rocks. ncgeolsoc.org/past-field-t...
June 19, 2025 at 8:27 PM
Our 2009 Gold Country field trip passed the rock shop west of Mariposa, where the field trip leader said he'd found a small gold nugget in the roadcut to the east. A recent visitor found no gold but lots of beautiful rocks. ncgeolsoc.org/past-field-t...
Our June speaker, from the FORGE geothermal project in Utah, will give us lots of background on the exciting developments in this thread.
What does the future of enhanced geothermal power generation look like?
Fervo offered an update to partners and investors at its #capeconnect event today, showcasing progress on its 100MW Cape Station project in UT.
I tagged along and I learned a lot. Some highlights based on my notes follow… 🔌💡
Fervo offered an update to partners and investors at its #capeconnect event today, showcasing progress on its 100MW Cape Station project in UT.
I tagged along and I learned a lot. Some highlights based on my notes follow… 🔌💡
June 12, 2025 at 2:49 AM
Our June speaker, from the FORGE geothermal project in Utah, will give us lots of background on the exciting developments in this thread.
Reposted by Northern California Geological Society
See our fall lineup of speakers at ncgeolsoc.org
From Sept to Nov we'll learn about a new kind of explosion structure, what sea-level rise means for groundwater, and what an odd quake in 1954 looks like from today's science.
From Sept to Nov we'll learn about a new kind of explosion structure, what sea-level rise means for groundwater, and what an odd quake in 1954 looks like from today's science.
June 12, 2025 at 1:48 AM
See our fall lineup of speakers at ncgeolsoc.org
From Sept to Nov we'll learn about a new kind of explosion structure, what sea-level rise means for groundwater, and what an odd quake in 1954 looks like from today's science.
From Sept to Nov we'll learn about a new kind of explosion structure, what sea-level rise means for groundwater, and what an odd quake in 1954 looks like from today's science.
Just added to our Past Field Trips page is David Howell's handout for our 2016 trip to two premium wine destinations in the Napa Valley with notable geology. ncgeolsoc.org/past-field-t...
June 11, 2025 at 3:03 AM
Just added to our Past Field Trips page is David Howell's handout for our 2016 trip to two premium wine destinations in the Napa Valley with notable geology. ncgeolsoc.org/past-field-t...
Our May Speaker, Walter Alvarez, gave a lucid personal picture of his wild surmise that a Pliocene inland sea once occupied the middle of the Sahara. He published a drier version <2 years ago in this open-access paper.
An enormous Pliocene or Quaternary Megalake Sudd on the River Nile in the Sudan Basin? A review of the dilemma, and a possible solution
It was first suggested in 1864 that a very large post-Miocene lake once occupied the Sudan Basin, centered on the Sudd — a nearly impenetrable papyrus…
www.sciencedirect.com
May 29, 2025 at 11:28 PM
Our May Speaker, Walter Alvarez, gave a lucid personal picture of his wild surmise that a Pliocene inland sea once occupied the middle of the Sahara. He published a drier version <2 years ago in this open-access paper.
NCGS member Gary Prost‘s new book, Rocks and Riches, introducing selected California geology sites everyone should visit, will be released by Heyday Books on July 22nd. Pre-order it here.
Rocks and Riches: Exploring California’s Stunning Geology
Take a road trip through deep time and California history, with a friendly expert geologist at the wheel.
www.heydaybooks.com
May 29, 2025 at 9:03 PM
NCGS member Gary Prost‘s new book, Rocks and Riches, introducing selected California geology sites everyone should visit, will be released by Heyday Books on July 22nd. Pre-order it here.
Mining geologist wanted for a big Zn-Au-Ag-Cu project near Mariposa! details in the alt text.
May 28, 2025 at 2:20 AM
Mining geologist wanted for a big Zn-Au-Ag-Cu project near Mariposa! details in the alt text.
Don't miss this video of the M 7.8 Myanmar earthquake as it moved the ground several meters at once.
First fault rupture ever filmed: M7.9 surface rupture filmed near Thazi, Myanmar
YouTube video by 2025 Sagaing Earthquake Archive
www.youtube.com
May 13, 2025 at 12:02 AM
Don't miss this video of the M 7.8 Myanmar earthquake as it moved the ground several meters at once.
We're taking reservations for our May 28 dinner meeting featuring UC Berkeley's Walter Alvarez, who will recount an excellent story of discovering (or rediscovering) an ancient giant lake where the Sahara Desert lies today, its traces still visible in the landscape. ncgs.regfox.com/ncgs-dinner-...
April 22, 2025 at 4:00 AM
We're taking reservations for our May 28 dinner meeting featuring UC Berkeley's Walter Alvarez, who will recount an excellent story of discovering (or rediscovering) an ancient giant lake where the Sahara Desert lies today, its traces still visible in the landscape. ncgs.regfox.com/ncgs-dinner-...