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Uploaded on:
11/03/2009 02:38:41
Type:
Digital Asset
File Size:
204.07 KB
Dimensions:
706 x 1000 pixels
80 views 4 downloads
P number: P521024
Caption: A fossil specimen of Calcirhynchia calcaria Buckman. A fossil brachiopod. (Brachiopoda.) '2 mile Burn' at lower waterfall of the two, Raasay, Invernessshire, Scotland.
Description: Formerly known as Rhynchonella calcicosta this small brachiopod is a common member of the Early Jurassic Schlotheimian fauna. British Geological Survey Biostratigraphy Collection number GSE 2356. A Rhynchonellid brachiopod. A small stout brachiopod almost triangular in outline with strong radial ribs or costae. There is a strong fold in the brachial valve and a corresponding deep sulcus or depression on the pedicle valve. There are many species of rhynconellids ranging from the Ordovician onwards. This specimen is from the Lower Lias on Raasay, a time when marine transgressions over the land transformed much of Jurassic Europe into an enormous, generally shallow epicontinental sea. Brachiopods first appeared in the Cambrian and declined rapidly in the Permian, though they do continue to the present day.
Date taken: 01/01/2003
Photographer: Unknown
Copyright statement: NERC
Orientation: Portrait
Size: 204.07 KB; 706 x 1000 pixels; 60 x 85 mm (print at 300 DPI); 187 x 265 mm (screen at 96 DPI);
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