.9" Agatized Fossil Ammonite (Promicroceras) - Lyme Regis

This is a very beautifully agatized, .9" Promicroceras planicosta ammonite fossil, collected from Lyme Regis, England. It's almost translucent and has been nicely prepared so that it displays very well on the limestone slab. This specimen has the impression of a second ammonite and what appears to be a third ammonite still encased in the limestone.



Ammonites were predatory mollusks that resembled a squid with a shell. These cephalopods had eyes, tentacles, and spiral shells. They are more closely related to a living octopus, though the shells resemble that of a nautilus. Ammonites appeared in the fossil record about 240 million years ago and they barely survived several major extinction events. The last lineages disappeared 65 million years ago at the end of the Cretaceous.

FOR SALE
$29
DETAILS
SPECIES
Promicroceras planicosta
LOCATION
Lyme Regis, Dorset, England
FORMATION
Lower Lias, Obtusum Zone
SIZE
.9" ammonite , 4.4 x 4.0" rock
ITEM
#110723
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