Flutterby™! : few pix from the hike up Hill 88 this

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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

[ 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.