3.7" Marston Magna Ammonite Cluster - Polished on Back

This is a very cool plate of small ammonite fossils from Marston Magna, Somerset, England. On one side of the plate, the ammonites have been prepared from the rock, and the back side has been cut and polished to reveal the ammonites in cross-section. The ammonites are of the species Promicroceras marstonense and are Lower Jurassic (~200 million years old) in age. This rock is quarried from near Marston Magna, Somerset, England and by slicing and polishing it the beautiful inner chamber detail of the ammonites can be seen.

It comes with an acrylic 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.

What an ammonite would have looked like while alive.
What an ammonite would have looked like while alive.
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DETAILS
SPECIES
Promicroceras marstonense
LOCATION
Marston Magna, Somerset, England
FORMATION
Lower Lias, Obtusum Zone
SIZE
3.7x2.5"
ITEM
#40229
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