THREE AMMONITES FOSSIL ROCK Fossils Sulawesi Relic Cephalopod Marine Ammonite
$260.00Or Best Offer
THREE Millions of years Ammonites FOSSILS found together with rock(note some beautiful crystal formation), gorgeous specimen.
Across: 6 - 6.5 cm / 2.4 - 2.6 inches
Weight: 0.3 kg / 0.66 lb
Wikipedia: Ammonites, as they pertain specifically to the order Ammonitida, are an extinct group of marine animals belonging to the cephalopod subclass Ammonoidea. They are excellent index fossils, and it is often possible to link the rock layer in which they are found to specific geological time periods.
The closest living relative of the Ammonitida is not the modern Nautilus, which they somewhat outwardly resemble, but rather the subclass Coleoidea (octopus, squid, and cuttlefish).
Their fossil shells usually take the form of planispirals, although there were some helically-spiraled and non-spiraled forms (known as heteromorphs).
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