Close up of internal patterning. Could this be post mortem occupancy by the brachiopod Orbiculoidea? (SEE Paul Seldon, John Nudds, Evolution of fossil ecosystems p47 on the occurrence and colonisation of Orbiculoidea around orthocone nautiloids)
No EXIF information is available
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Keywords:cumbria, fossils, geology, lake district, national trust, nautilioids, orbiculoidea, ordovician, palaentology, silurian
