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Uploaded on:
14/02/2009 07:14:59
Digital Asset
File Size:
424.99 KB
793 x 1000 pixels
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P number: P007711
Old photograph number: A12614
Caption: Coastal cliff, 1200 m. S. of Penarth Pier.
Description: Coastal cliff, 1200 m. S. of Penarth Pier. Penarth Group in cliff at Seven Sisters Bay, Penarth. Strata exposed in cliff: Lower Lias. 1) 'Ostrea beds', flat-bedded limestones with thin shales. Paper shale horizon at base. Penarth Group (Triassic) Lilstock Formation: 2) 'Watchet Beds', grey calcareous siltstone and mudstone. 3) 'Langport Beds', three thin beds of pale grey very fine-grained limestone. 4) 'Cotham Beds', orange weathering calcareous siltstone and sandstone - filling cracks in pale grey mudstone below. Westbury Formation: 5) Black shales with Rhaetavicula contorta thin beds of nodular calcareous mudstone and pyritiferous sandstone can be seen in the photograph. Mercia Mudstone Group: Tea Green Marl: 6) Unevenly bedded grey limestone. Hollows in upper surface infilled with quartz pebbles and fish fragments (Rhaetic Bone Bed). Height of cliff 15 m.
Date taken: 01/01/1977
Photographer: Jeffery, C.J.
Copyright statement: NERC
Acknowledgment: This image was digitized with grant-in-aid from JIDI the JISC Image Digitization Initiative
X longitude/easting: 318700
Y latitude/northing: 170200
Coordinate reference system, ESPG code: 27700 (OSGB 1936 / British National Grid)
Orientation: Portrait
Size: 424.99 KB; 793 x 1000 pixels; 67 x 85 mm (print at 300 DPI); 210 x 265 mm (screen at 96 DPI);
Average Rating: Not yet rated
Categories: Best of BGS Images/ Geological structures, Geoscience subjects/ Sedimentary features/ Bedding-planes  


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