Earthwatcher

Earthwatcher deceased

Posted: 13 Mar 2015


Taken: 21 Jun 2012

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1/200 f/5.0 17.0 mm ISO 100

Canon EOS 350D DIGITAL


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Keywords

rocks
geo:lat=58.17312463160244
Skolithos
Skiag Bridge
Pipe Rock Member
Pipe Rock
Eriboll Formation
trace fossils
Cambrian
Loch Assynt
Sutherland
Scotland
geology
geotagged
geo:lon=-5.002879923942601


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'Pipe Rock' at Skiag Bridge, Loch Assynt, Sutherland (wide view)

'Pipe Rock' at Skiag Bridge, Loch Assynt, Sutherland (wide view)
This is the classic exposure of the Pipe Rock Member of the Eriboll Formation (early Cambrian) at Skiag Bridge, Loch Assynt, Sutherland, Scotland.

Cross-bedded pale grey quartzitic/feldspathic marine sandstones deposited as sand bars in a near-shoreline environment are stained purplish-red and penetrated by Skolithos burrows infilled with creamy grey sandstone.

This indicates that there was periodic halting of sedimentation and near, or actual emergence, so that oxidation of the iron and manganese minerals in the sediments could occur and the top part of the sediments colonised by burrowing organisms, probably worm-like animals.

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