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3.1" Marston Magna Ammonite Cluster
This is a cluster of Promicroceras marstonense ammonite fossils from Marston Magna, Somerset, England. The ammonites are of the species Promicroceras marstonense and are Lower Jurassic (~200 million years old) in age.
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
Promicroceras marstonense
LOCATION
Marston Magna, Somerset, England
FORMATION
Lower Lias, Obtusum Zone
SIZE
3.1x1.6"
CATEGORY
SUB CATEGORY
ITEM
#30762
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