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Earthwatcher

Earthwatcher deceased

Posted: 12 May 2006

Taken: 16 Aug 2004

0 favorites     2 comments    205 visits

1/500 • f/4.5 • 12.8 mm • ISO 64 •

OLYMPUS OPTICAL CO.,LTD C5050Z

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Geology Geology

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Keywords

landscape •
Upper Carboniferous •
Chatsworth Grit •
'Millstone Grit' •
cross bedding •
Carboniferous •
Peak District National Park •
bedding •
geology •
cliff •
derbyshire •
rocks •
tor •
Eastern Edges •

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205 visits

Valkyrie Pinnacle - a tor on Froggatt Edge

Valkyrie Pinnacle - a tor on Froggatt Edge
'Valkyrie Pinnacle' - a tor of cross-bedded Chatsworth Grit on Froggatt Edge, overlooking the Derwent Valley. Derbyshire, England.
Comments
 slgwv
slgwv club
Nice highlighting of the crossbeds by weathering. Are they interpreted to be dunes (they look pretty big and reasonably tabular)?
9 years ago.
Earthwatcher club has replied to slgwv club
Yes, these would qualify for dune-size cross bedding. But just to remove any possibility of doubt, these rocks were deposited in a high-energy fluvial environment, in a delta distributary channel system. The upper half of the tor shows three distinct units of foreset cross bedding, with the upper part of each foreset truncated by an erosion surface upon which the succeeding unit was deposited.
9 years ago.

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