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Pliny the Younger at The Good Hop. Some kinda football game going on.

New blog post on a special place in the Oakland Hills. oaklandgeology.com/2025/02/17/the…

Goodbye to the Northern California Geological Society account; on the happier, bluer place now as norcalgeolsoc. Been a good eight years and a lousy one year.

Two billionaires smile as a fake billionaire tries to steal the nation's public land for billionaires' benefit. americanprogress.org/article/trump-…

Last day for early registration at the GSA Cordilleran Section meeting in Sacramento, April 1-4. It will cost a lot more tomorrow. geosociety.org/GSA/Events/Sec…

The lower mantle occupies over half of Earth’s volume, and accordingly, its mineralogy is crucial in determining the structure and dynamics of Earth. Davemaoite, the calcium silicate perovskite, was believed to coexist with bridgmanite in the lower mantle and is considered

Try the alternative place; the water's fine

My biweekly blog post oaklandgeology.com/2025/03/17/the…

New blog post is up at oaklandgeology.com/2025/03/31/tha… Also the Substack is going out at 11:00 sharp.

First attempts at an indentor/escape sandbox model setup. I always wondered how this might work. Coulombic aspects apply, so blocks aren’t driven outwards until enough wedge builds up, a major difference from a metal/plasticine setup. The internally undeformed blocks are cool.

bsky.app/profile/norcal…

Any of you who were at the GSA 2025 Cordilleran Section meeting earlier this month and missed my talk, I've uploaded my PPT deck (in PDF) *and* talking script. Just look for my abstract "Geologic Setting of Lake Merritt." Have any of you uploaded their stuff?

With Trump's move to open the seabed to metal mining, this report needs many new readers. postandcourier.com/news/special_r…

New blog post at deepoakland.com oaklandgeology.com/2025/04/28/ear…

Hold up one finger if you're being threatened with bodily harm, two if you want us to surround your home.

New blog post. oaklandgeology.com/2025/05/12/a-s…

One week to go. eventbrite.com/e/geologists-w…

New blog post: oaklandgeology.com/2025/05/26/sno…

New blog post: a geoheritage view of Oakland's Claremont Canyon oaklandgeology.com/2025/06/23/cla…