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Uploaded on:
11/03/2009 02:42:15
Digital Asset
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P number: P521034
Caption: A fossil specimen of Isastraea oblonga Fleming. A fossil coral. (Coelenterata, Anthozoa, Zoantharia.) On shore below Navidale Cottage, and S.W. towards old distillery, Helmsdale, Sutherland, Scotland.
Description: A colonial Scleractinian coral from the Jurassic that formed clumps/patches in calcarenite/hardground environments. It never formed substantial reefs but took advantage of clear water with rich supply of drifted food and the temporary hard substrates of drifted shells. British Geological Survey Biostratigraphy Collection number GSE 3195. Corals are marine animals related to jellyfish and sea anemones. They have mobile larvae that become sessile (fixed to one place) after a few days. The soft-bodied animal, the polyp, lives in a calcareous skeleton called a corallum. The polyp removes calcium carbonate from the seawater to create a skeleton of calcite or aragonite. This specimen is from the Lower Kimmeridgian, Jurassic rocks and was found on the shore below Navidale Cottage, and south-west towards the old distillery, Helmsdale.
Date taken: 01/01/2003
Photographer: Unknown
Copyright statement: NERC
Orientation: Landscape
Size: 191.47 KB; 1000 x 665 pixels; 85 x 56 mm (print at 300 DPI); 265 x 176 mm (screen at 96 DPI);
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Categories: Best of BGS Images/ Fossils  


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