Sheared Lewisian Gneiss
Sheared Lewisian Gneiss (close-up view)
The 'Multi-couloured Rock Stop' detail 1
The 'Multi-couloured Rock Stop' detail 2
Valerian seed head
Columbine droplets
Grass droplets
Pear leaves 'pleochroic halos'
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Autumn beech leaves #2
Autumn beech leaves #3
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Conglomerate at Gravel Bay: close-up view 1
Conglomerate at Gravel Bay: close-up view 2
Gravel Bay - millipede-like burrows in Moor Cliffs…
East Pickard Bay - English stonecrop
Hornet hoverfly - Volucella zonaria
Lichen on wall - detail
Cat's ear at ground level
Gait Barrows National Nature Reserve meadow 2
Load structures on turbidite sandstones, Crooklets…
Load structures on turbidite sandstones, Crooklets…
Syncline axis (detail), Wrangle Point, near Bude,…
Beach pebbles, Budleigh Salterton
Foam and pebbles
Ancient timber and old iron
Profile of a Painted Lady
Painted Lady from the front
Painted Lady feeding
Look at that pollen sac!
It looks like a bee....
Sucking the nectar
Buzz buzz buzz
Howdale Moor Cotton grass 3
Howdale Moor Cotton grass 2
Seaweed and light, indigo and gold
We're being watched again....
En-echelon quartz veins, Marloes, Pembrokeshire 4
Detail from 'Scallop', Aldeburgh, Suffolk
Strumble Head pillow lavas 3
Rose hip
1/250 • f/5.6 • 64.0 mm • ISO 100 •
Canon EOS 350D DIGITAL
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'Pipe Rock' at Skiag Bridge, Loch Assynt, Sutherland (close-up view)
!['Pipe Rock' at Skiag Bridge, Loch Assynt, Sutherland (close-up view) 'Pipe Rock' at Skiag Bridge, Loch Assynt, Sutherland (close-up view)](https://cdn.ipernity.com/200/84/22/38318422.40873a84.640.jpg?r2)
![](https://s.ipernity.com/T/L/z.gif)
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.
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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