4.75" Cut/Polished Calycoceras Ammonite (Half) - Texas

This is a Calycoceras tarrantense ammonite fossil from the Late Cretaceous Woodbine Formation of Texas which has been sliced in half and polished to reveal the beautiful, inner chamber detail. Many of the chambers are preserved as deep, calcite crystal lined pockets.
One half of the fossil is included along with 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.

What an ammonite would have looked like while alive.
What an ammonite would have looked like while alive.
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DETAILS
SPECIES
Calycoceras tarrantense
LOCATION
Tarrant County, Texas
FORMATION
Woodbine Formation
SIZE
4.75" wide, up to 1.2" thick
CATEGORY
ITEM
#93540
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