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France (2)
Fluorite (also called fluorspar) is the mineral form of calcium fluoride
The shelly fossil record shows a well-recognized pattern of macroevolutionary stasis between the Cambrian Explosion and the Great Ordovician Biodiversification Event
1969) the most common form with antennas
Huge vertebra of Zarafasaura oceanis
20031 - Museum Grade Bavarilla zemmourensis with Preserved Antennae Lower Ordovician Trilobite Clypeaster France (2)Bavarilla sp, Barrande 1868 (trilobite) Trilobita Phacopida Bavarillidae Incredible specimen of this species which exceptionally preserve his antennae. It comes from the Lower Ordovician of the Famous Fezouata Formation. The conservation of soft parts in the fossil record is somewhat exceptional and only occurs under certain and exclusive taphonomic conditions. For example, anoxic substrates without oxygen, where the organic matter has difficulty
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