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Geology

Ecology1$ribbon-chert.jpg

"Developed" hillside provides a clear look at San Francisco's common chert underpinning. After being carved away it becomes ripe for invasion, in this picture being overrun by the exotic French Broom (with the yellow blossoms).

Photo: Chris Carlsson

Pages in category "Geology"

The following 4 pages are in this category, out of 4 total.