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Friday Field Foto #122: Channelized Miocene strata, Tierra del Fuego

August 27, 2010

This week’s Friday Field Foto is from some Miocene beach-cliff exposures on the Atlantic coast of Tierra del Fuego. These sandstones are characterized by a mix of ‘normal’ turbidites thick successions of traction-dominated (including large climbing dunes) deposits. Also note the surface cutting down from left to right in upper part of cliff — a nice erosional surface, which is overlain by mostly thin-bedded, fine-grained strata.

Miocene sedimentary rocks, Tierra del Fuego coast (© 2010

Happy Friday!

4 Comments leave one →
  1. August 27, 2010 2:00 pm

    Spectacular exposure! At first I thought that it was a remarkable roadcut, but then I panned down to the bottom and saw the scale in the foreground (and finally I read your description). Wow! Is the access only at low tide?

  2. August 27, 2010 2:31 pm

    Ron, and it goes on like this for at least a couple of kilometers along the beach. I’ll have to put together a mosaic one of these days. If I remember some promontories were only accessible in low tide, but some parts you could get to anytime (well, at least for the tidal cycles that particular day)

  3. LI yuanhao permalink
    March 29, 2011 11:09 pm

    This is a good picture in deep water sedimentary.Early thin mud sediments were eroded by river channel or turbidite channels. Then deep lake sediments deposited.


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