Two Iridescent Ammonites (Psiloceras) - England

This is a pair of brilliantly iridescent ammonites (Psiloceras planorbis) fossil from England. It has a naturally iridescent shell showing nice blues, greens and deep red colors. Like most fossils from the Blue Lias Formation, these ammonites have been compressed and flattened by the same geological processes of heating and pressure which gives them their iridescent shell.

Both ammonites are quite large for the species at 2.1" across and have a lot of flash. A beautiful piece.



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.

DETAILS
SPECIES
Psiloceras planorbis
LOCATION
Noth Somerset, England
FORMATION
Blue Lias Formation
SIZE
2.1" wide (each) on 5.8x4.1" shale
ITEM
#130444
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