10 August 2018

Friday fold: Gnarly chert from Spy Rock

Posted by Callan Bentley

Happy Friday!

Today for for the Friday fold, I have another guest fold: These are Franciscan mélange cherts from Iron Mountain, California, near Laytonville in Mendocino County, on Spy Rock Road. It’s the same stuff you see at Marin Headlands, with outcrops of serpentinite nearby to boot!

These photos were shared by my sister-in-law Gabriella and her husband Jesse; the outcrops are just up the road from their farm on Spy Rock.

Sense of scale in these photos is Jesse’s hand, a lip balm tube, and Gabriella herself!

Thanks for sharing, Jesse and Gaby!

Happy Friday to all.