Northern California Geological Society @norcalgeolsoc.bsky.social · 26/09/2026Congratulations to Dr. Dawn Sumner, a new AGU Fellow! She was our speaker in September 2000 and had a full-page summary in the October newsletter, preserved on our website. ncgeolsoc.org/past-meeting...ncgeolsoc.orgPast Meetings 2000–01 to 2009–10Past Meetings, 2000–01 to 2009–10 Click the talk title to see the talk abstract and speaker’s biography (PDF). June 28, 2000Keil Albert, Geoconsultants Inc. ― Provenance of the Irvington Grav… 021
Reposted by Northern California Geological SocietyAlessandro Chiarenza @macroecoevoale.bsky.social · 16/09/2026How do you take the temperature of a T. rex 66 million years too late? Time machine? Impossible. Billionaire’s dinosaur island? Risky. Geochemistry? Much safer 🦖🌡️ Our new Science Advances paper adds evidence for an endothermic, “warm-blooded” T. rex, link to the paper 🔗 doi.org/10.1126/scia... 18528
Reposted by Northern California Geological SocietyDavid Grinspoon @drfunkyspoon.bsky.social · 31/08/2026I’m doing 2 presentations at Exploratorium in San Fran Thurs 9/3 part of "After Dark: Pale Blue Dot" 7:30 PM “OUR PLANETARY FUTURE: How can we go from just changing Earth to caring for it?" 8:15 "Ask an Astrobiologist Anything" discussion. Hope to see you! www.exploratorium.edu/visit/calend...exploratorium.eduAfter Dark: Pale Blue Dot | Exploratorium Museum EventTake a step way back and see our planet in context: a tiny yet dynamic system in a vast cosmic neighborhood. 095
Northern California Geological Society @norcalgeolsoc.bsky.social · 26/08/2026Mt. Diablo Interpretive Association hosts a talk Wednesday 8/26 on the geology of the Mount Diablo area.mdia.orgPlate Tectonic Evolution of Mount Diablo | mdiaWebinar - Registration Required 0135
Reposted by Northern California Geological SocietyBrad Johnson @climatebrad.hillheat.com · 25/08/2026The Trump Department of Interior is forcing out dozens of its most senior career staff, giving them two weeks to accept involuntary reassignments or leave. Fish and Wildlife Service, U.S. Geological Survey, Bureau of Land Management, and more. www.notus.org/agencies/int...notus.org‘They Want Us All To Leave’: Interior Reassigns Dozens of Senior StaffAround 30 top staffers have been reshuffled, with some people moving to teams outside their areas of expertise. 36462
Reposted by Northern California Geological SocietyAlexandra Witze @alexwitze.bsky.social · 20/08/2026Do you want to write a story about volcanoes that changed history? the editor asked. Why yes. Yes, I do. My piece in @knowablemag.bsky.social on the terrible, horrible, no good, very bad days that can transpire after an eruption: knowablemagazine.org/content/arti... 🧪🌋knowablemagazine.orgVolcanoes that made historyLong after the lava stopped flowing, enormous eruptions altered Earth’s climate and societies all over the globe 818363
Reposted by Northern California Geological SocietyAndrew Alden @geology.bsky.social · 17/08/2026The most amazing cave formations I've seen since the Naica giant gypsum spears.pubs.geoscienceworld.orgCave speleogenesis constrains landscape evolution and drainage integration in southern Nevada since 1.6 Ma | Geosphere | GeoScienceWorld 4217
Reposted by Northern California Geological SocietyHenning @geohenning.bsky.social · 13/08/2026A new video emerged which seems to show a surface rupture in Yatsushiro, Japan following the M6.8 earthquake in July! Exact location of the video would be 32°30'04.0"N 130°38'29.9"E. Absolutely wild. Only the second ever video of a surface rupture forming after the 2025 Myanmar video! ⚒️🧪 #geology 17577212
Reposted by Northern California Geological SocietyGarry Hayes @geotripper.bsky.social · 24/07/2026Day 14 of our PNW field studies found us driving home across northern Nevada. We stopped for the night at at Angel Creek and Lake in the Eastern Humboldt Range. This Range was considered for national park status in the 1990s. The rocks are part of an ancient metamorphic core complex. 2454
Reposted by Northern California Geological SocietyRandall Munroe @xkcd.com · 03/07/2026Holes xkcd.com/3266/ 1364967966
Northern California Geological Society @norcalgeolsoc.bsky.social · 25/06/2026earthquakeinsights.substack.com/p/catastroph...earthquakeinsights.substack.comCatastrophic M7.5 earthquake strikes northern VenezuelaSevere damage; collapsed buildings; significant fatalities possible 010
Northern California Geological Society @norcalgeolsoc.bsky.social · 05/06/2026Our Scholarship Chair Phillip Garbutt is stepping down after 21 years. To mark the occasion NCGS members have made/pledged contributions to our scholarship fund totaling more than $2,000. Donations through August will add to the total; use our event registration page at ncgs.regfox.com/ncgs-landing 011
Northern California Geological Society @norcalgeolsoc.bsky.social · 30/05/2026A personal post from yer 'umble webmaster. 000
Northern California Geological Society @norcalgeolsoc.bsky.social · 17/05/2026Our June meeting is NCGS Members Night! Tom MacKinnon: Dimensions of Underplated Slices in Ancient Accretionary Complexes in NZ & Calif Don Medwedeff: East Bay Growth Structures: How Best to Analyze Them? Wayne Narr: Depositional & Lithological Control on Fractures in a Steep Reefal Carbonate Margin 010
Reposted by Northern California Geological SocietyProf Col Macpherson @colinmacpherson.bsky.social · 14/05/2026For geologists ⚒️🧪; silver screen 🤝 concrete boots 094
Northern California Geological Society @norcalgeolsoc.bsky.social · 02/05/2026Register for our annual May dinner meeting, May 27, featuring Dr. Peter Roopnarine's talk, "Everything changes, but remains the same: Persistent and repeating ecosystems in Earth's history"ncgs.regfox.comNCGS Dinner Meeting May 2026Get tickets online for NCGS Dinner Meeting May 2026 here. 000
Reposted by Northern California Geological SocietyCalifornia Geological Survey @cageosurvey.bsky.social · 30/04/2026NEW RELEASE! Sierra Nevada Earth Science Atlas The Sierra Nevada Earth Science Atlas provides the most detailed geologic framework mapping of the Sierra Nevada that has ever been made. www.conservation.ca.gov/cgs/sierra-n... 1017156
Reposted by Northern California Geological SocietyDr. Wendy Bohon @drwendyrocks.bsky.social · 17/04/2026Fault creep on the Maacama fault, with @timblor.bsky.social 19324
Northern California Geological Society @norcalgeolsoc.bsky.social · 12/04/2026Our April meeting features James Faulds, Nevada Bureau of Mines, speaking on Nevada's great geothermal endowment and how geology put it there: April 29. 010
Reposted by Northern California Geological SocietyTim Dawson @timblor.bsky.social · 11/04/2026Gift article about vertical evacuation structures in the PacNW: These Towns Want a Tsunami Shelter Before It’s Too Late www.nytimes.com/2026/04/11/r...nytimes.comThese Towns Want a Tsunami Shelter Before It’s Too Late 183
Reposted by Northern California Geological SocietyLiz Hearn @liz-hearn.bsky.social · 10/04/2026Are you in southern California or Baja? Let the USGS know if you felt the sonic boom from the Artemis re-entry! DYFI link: earthquake.usgs.gov/earthquakes/... 4193139
Reposted by Northern California Geological SocietyTim Dawson @timblor.bsky.social · 04/04/2026Found out that George Plafker, USGS earthquake geologist known for his work after the 1964 Alaska earthquake passed away yesterday at 97. I was able to spend a few days in the field with him after the 2002 Denali EQ, as well as seeing him often at the USGS in Menlo Park. Full of amazing stories. 53911
Northern California Geological Society @norcalgeolsoc.bsky.social · 04/04/2026Our 2025-26 scholarship recipient, Nancy Carman, presented last month at the Lunar and Planetary Science Conference on her comparison of Lassen Volcano fumaroles and Gusev crater, Mars. www.hou.usra.edu/meetings/lps... 000
Northern California Geological Society @norcalgeolsoc.bsky.social · 04/04/2026Abstract for our April meeting talk by James Faulds of Nevada Bureau and Mines and Geology: ncgeolsoc.org/wp-content/u... 000
Northern California Geological Society @norcalgeolsoc.bsky.social · 28/03/2026Our field trip guide to the summit and western flank of Mount Diablo is now publically available. Find the PDF in our Past Field Trips table.ncgeolsoc.orgPast Field TripsPast NCGS Field Trips This table lists the field trips we have conducted since our founding in 1944. Particularly during 2003–2006, NCGS members created reports of these outings for posting online.… 063
Reposted by Northern California Geological SocietyCin-Ty Lee @cintylee.bsky.social · 27/03/2026arclogite sample from the Sierra Nevada, California. These are deep arc cumulates. I got started on these rocks when I was an undergrad... they have taken me down many many paths. But above all, they are just pretty to look at. 0302
Northern California Geological Society @norcalgeolsoc.bsky.social · 22/03/2026Steve is an NCGS member. 110
Reposted by Northern California Geological SocietyThe One True Kat @theonetruekat.bsky.social · 13/03/2026Friendly reminder that the spicy noodles are not your enemy and deserve your protection. This little man was next to our check-in point, so he was moved just a little further away, into protective cover. Northern Pacific Rattlesnake. #herps 2327
Reposted by Northern California Geological SocietyAnne Jefferson @annejefferson.bsky.social · 10/03/2026Tonight, I was looking at water.noaa.gov to see where the US is flooding. My 11-year old pointed to the ongoing major flooding in North Dakota, and I said "Oh, that's Devils Lake. It's always flooding there." They asked "Why?" and a rabbit hole yawned before me.water.noaa.govNational Water Prediction Service - NOAA 39121
Reposted by Northern California Geological SocietyKristian Svennevig @ksvenenvig.bsky.social · 03/03/2026Tsunamigenic rockslide on your desktop? This is a scaled and simplified model of the 2017 Karrat landslide. I think it captures the dynamics of the tsunami generation quite well, though it is of course, very simplified. 04715
Reposted by Northern California Geological SocietyBritish Geological Survey @bgs.ac.uk · 19/02/2026The identification of a 'smiling' object found on Holy Island in Northumberland has been confirmed by BGS senior paleontologist Jan Hennissen. www.bbc.co.uk/news/article...bbc.co.uk'Smiling' fossil discovered in NorthumberlandThe unusual looking fossil is estimated to be a few hundred million years old dating to the Carboniferous period. 39419139
Northern California Geological Society @norcalgeolsoc.bsky.social · 20/02/2026You seen this fossil being memeified? 010
Northern California Geological Society @norcalgeolsoc.bsky.social · 19/02/2026NCGS has awarded $2000 scholarships: Nancy Carman (U Wisc Milwaukee), "Redox-driven mineral evolution in Lassen’s hydrothermal system: Seasonal controls on active surface alteration" Gwyneth Chilcoat (UC Davis), "Reconstructing shellfish communities of the Holocene San Francisco Bay" Congrats! 011
Reposted by Northern California Geological SocietyGarry Hayes @geotripper.bsky.social · 17/02/2026The view of Death Valley from Dante's view is spectacular. Lake Manly is clearly drying up but it may get a little push from the storms coming through this week. #deathvalley 1233
Reposted by Northern California Geological SocietyCAL FIRE @calfire.bsky.social · 07/02/2026🏈 Wildfire plays offense. Your home needs defense. Firewood stacked against the house, leaves in the gutters, and flammable fences create gaps in your defense. Defensible space closes those gaps by separating fuels and stopping embers before they reach your home. #SuperBowl #GameDay #Championship 3378
Northern California Geological Society @norcalgeolsoc.bsky.social · 02/02/2026From our webmaster: oaklandgeology.com/2026/02/02/t...oaklandgeology.comThe story of blue rockThere was a long period in Oakland’s history when the city cared deeply about its streets and took great pains with the rock it used in them. The tiny village that became Oakland in 1852 was … 030