few pix from the hike up Hill 88 this
2011-10-16 23:21:33.126272+00 by Dan Lyke 2 comments
A few pix from the hike up Hill 88 this morning. http://www.flutterby.net/2011-10-16_Hill_88_Hike
2011-10-16 23:21:33.126272+00 by Dan Lyke 2 comments
A few pix from the hike up Hill 88 this morning. http://www.flutterby.net/2011-10-16_Hill_88_Hike
[ related topics: Nature and environment ]
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#Comment Re: made: 2011-10-17 12:41:37.345279+00 by: m
The rock folding was extremely interesting. Do you know what kind of rock this is, and can you give a sense of scale to either the ridges or the picture. Thnx
#Comment Re: made: 2011-10-17 14:38:07.49834+00 by: Dan Lyke [edit history]
There's a picture of a very similar folding in the Marin Headlands on this page that's labeled as "radiolarian cherts", as I'm interpreting the page it's a sedimentary rock formed from the debris of some sort of single-celled organism.
I'd say the folds are, on average, about two inches thick.