SN5882 : Aberystwyth Grits - flute casts

taken 6 years ago, near to Aberystwyth, Ceredigion/Sir Ceredigion, Great Britain

Aberystwyth Grits - flute casts
Aberystwyth Grits - flute casts
This picture shows a detail from the underside of the thick sandstone layer found in the cove at the seaward foot of Constitution Hill, Aberystwyth LinkExternal link . Flute casts such as these are depressions in the underlying sediment when its surface is scratched by larger objects in a turbidity current. The underlying sediment has been eroded away, leaving a negative of the original scratch pattern. Because sand is the first sediment settling from a turbidity current and sandstone tends to be harder than mudstone, such flute casts are generally found exposed on the underside of sandstone beds.
Annotated version of the picture showing the direction of flow: LinkExternal link
Craigyfulfran GCR site
The coastal stretch north of Aberystwyth towards Clarach is known for its exposed turbidite beds LinkExternal link and for their intricate folding and faulting patterns LinkExternal link . The name of the site originates from a sea stack located on the foreshore (links above are to the Geological Conservation Review's site reports).
Geological Conservation Review
The Geological Conservation Review (GCR) is a database of geological reference sites in Great Britain. It is published by the Joint Nature Conservation Committee (JNCC) in the form of site reports collected in printed volumes covering different geological periods and topical areas such as fossils, minerals or geomorphology. The site reports are gradually put online in a searchable database LinkExternal link .
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SN5882, 690 images   (more nearby )
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Date Taken
Sunday, 20 May, 2012   (more nearby)
Sunday, 9 September, 2012
Geographical Context
Coastal  Geological interest  Rocks, Scree, Cliffs 
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Near (from Tags)
Subject Location
OSGB36: geotagged! SN 5826 8264 [10m precision]
WGS84: 52:25.3995N 4:5.1516W
Camera Location
OSGB36: geotagged! SN 5826 8264
View Direction
EAST (about 90 degrees)
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Other Tags
Aberystwyth Grits  Sandstone  Strata  Flute Casts  Turbidity Current 

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