2.9" Jurassic Cut & Polished Ammonite Fossil (Half) - Madagascar
This is a 2.9" cut and polished Jurassic aged ammonite fossil collected in the Tulear Province of Madagascar. Most of the cut and polished ammonites that you see from Madagascar are Cretaceous in age, but those with orange/yellow/pink coloration are Late Jurassic (Oxfordian Stage) in age, nearly 50 million years older. There are a number of species/genus of Phylloceratida ammonites from this location which look very similar, this one appears to be Ptychophylloceras.
The previously hollow chambers of the ammonite were replaced with a beautiful agate during the fossilization process. Some of these chambers are still partially hollow and lined with druzy crystals. The ammonite was cut in half and polished revealing the inner chamber structure of this ancient marine animal. One half is included and is accompanied by a display stand.
The previously hollow chambers of the ammonite were replaced with a beautiful agate during the fossilization process. Some of these chambers are still partially hollow and lined with druzy crystals. The ammonite was cut in half and polished revealing the inner chamber structure of this ancient marine animal. One half is included and is accompanied by a display stand.
Ammonites were predatory cephalopod mollusks that resembled squids with spiral shells. They are more closely related to living octopuses, though their shells resemble that of nautilus species. True ammonites appeared in the fossil record about 240 million years ago during the Triassic Period. The last lineages disappeared 65 million years ago at the end of the Cretaceous.
SPECIES
Phylloceratida?
LOCATION
Sakaraha, Tulear Province, Madagascar
SIZE
2.9" wide
CATEGORY
SUB CATEGORY
ITEM
#289255
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