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  • Polished Goniatite Ammonoid 175mm
  • Polished Goniatite Ammonoid 175mm

Polished Goniatite Ammonoid 175mm


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Nature made, this wonderful example of a specimen goniatite is part of the cephalopoda group, a distant relative of nautili, octopi and modern squids, a mollusc of the ammonoid family, this is the result of 400 million years of fossilisation, which has preserved internal structure of the molluscs shell. The goniatite once had tentacles like a cuttle fish which it would use to grapple prey to force down into its mouth and eat with a horned beak like structure in its mouth, much like a modern day squid. Read more below...

Genus: Goniatite Ammonoid.
Age: Palaeozoic era, Devonian, approximately 420 to 355 million years.
Origin: Morocco, North Africa.

Goniatite ammonoid measurements.
Height: 17.5 cm
Width: 21.0cm
Depth: 8.0 cm

Approximate weight: 3.90 kg

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An beautifully polished goniatite of the order Goniatitida part of the sub class of ammonoidea. This image speaks volumes, a delightful specimen.The sediments over time have created distinctive linear definition, the inner shell morphology the chambers of the cephalopod, have infilled with white calcite, a form of the mineral quartz. These minerals formed from within the fossil bed, by a process of per-mineralization, heavily mineral saturated water from the locality has been forced through the tissues of the shell in a cell by cell absorption process. This eventually turning the remains of the cephalopod into limestone.

Once discovered in the fossil layer it was collected in its tomb of solid limestone, then patiently released from its host rock and carefully worked and polished to reveal the inner ceratitic chambers. A unique occurrence which has been brought back to life so to speak, through the fossil preparators preparation process.

The ammonoid free stands enabling display. The ceratitic chambers which identify the type of ammonoid are naturally filled with very subtle lime green quartz. The chamber walls picked out in contrasting black. A highly decorative and interesting study fossil.

Additional Information

Age Devonian
Origin Morocco
Colour Black