4.9" Very Iridescent Fossil Baculites Section - South Dakota

 
This is a stunning, 4.9" long fossil Baculites section from the Pierra Shale of South Dakota. The iridescence in this piece is particularly pronounced. I've rarely seen this much purple and green brilliance in these fossils.

Baculites ("walking stick rock") is an extinct cephalopod genus with a nearly straight shell, included in the heteromorph ammonites. The genus, which lived worldwide throughout most of the Late Cretaceous.

As with other ammonites, the shell consisted of a series of camerae, or chambers, that were connected to the animal by a narrow tube called a siphuncle by which gas content and thereby buoyancy could be regulated in the same manner as Nautilus does today.

From shell isotope studies, it is thought that Baculites inhabited the middle part of the water column, not too close to either the bottom or surface of the ocean.

Baculites fossils are very brittle and almost always break. They are most commonly found broken in half or several pieces, usually along suture lines. Individual chambers found this way are sometimes referred to as "stone buffaloes" (due to their shapes), though the Native-American attribution typically given as part of the story behind the name is likely apocryphal.
FOR SALE
$195
DETAILS
SPECIES
Baculites cuneatus
LOCATION
Meade County, South Dakota
FORMATION
Pierra Shale
SIZE
4.9" long
ITEM
#155436
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