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)
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...
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?
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!
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...
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.
Our website has pictures now in the home page News section. This is one of our latest scholarship winners, whose poster presented last week at the GSA Cordilleran Section meeting acknowledged NCGS.
April 11, 2025 at 12:02 AM
Our website has pictures now in the home page News section. This is one of our latest scholarship winners, whose poster presented last week at the GSA Cordilleran Section meeting acknowledged NCGS.
This baby.
January 22, 2025 at 11:56 PM
This baby.
Our January meeting is coming up on the 29th. Details in the newsletter or the website.
January 22, 2025 at 4:16 AM
Our January meeting is coming up on the 29th. Details in the newsletter or the website.
You may get an unexpected goodie in a place like this. In my case it was an actinolite hand specimen.
January 22, 2025 at 4:06 AM
You may get an unexpected goodie in a place like this. In my case it was an actinolite hand specimen.
Our NCGS Gold Country field trip in 2009 visited the remarkable Columbia karrenfeld, a natural marble washboard that collected several large fortunes worth of gold nuggets but now hosts historic tourist sites and a large marble quarry.
January 10, 2025 at 6:31 AM
Our NCGS Gold Country field trip in 2009 visited the remarkable Columbia karrenfeld, a natural marble washboard that collected several large fortunes worth of gold nuggets but now hosts historic tourist sites and a large marble quarry.
In 2015 NCGS members enjoyed a day trip to The Geysers.
December 24, 2024 at 6:05 PM
In 2015 NCGS members enjoyed a day trip to The Geysers.
Phillip Garbutt holds "The Whopper" during NCGS's 2002 field trip to the Sixteen To One Mine (ncgeolsoc.org/sierra-butte...)
December 11, 2024 at 3:02 AM
Phillip Garbutt holds "The Whopper" during NCGS's 2002 field trip to the Sixteen To One Mine (ncgeolsoc.org/sierra-butte...)
A hand specimen of phyllite from the Salt Springs Slate, collected during our October field trip on the Amador Central Railroad.
November 28, 2024 at 6:22 PM
A hand specimen of phyllite from the Salt Springs Slate, collected during our October field trip on the Amador Central Railroad.