Tuesday, 17 April 2007

Mineral Spot: Opalised Belemnites...

Belemnites are an extinct group of cephalopods, similar to the modern squid. Their fossilised remains are usually restricted to their shell. Rarely, as in the photo, the fossils are opalised. This specimen was in one of the showcases at Tucson and is probably from Coober Pedy in South Australia.

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