SET OF FOUR UNUSUAL GREEN PERISPHINCTES AMMONITES FROM RARE DEPOSIT

Grafenberg, Germany

UPPER JURASSIC PERIOD (MALM):   154 - 144 million years ago

A VERY rare occurrence can be found at an exclusive Upper Jurassic fossil-bearing site in Germany.  The ammonites have been preserved a beautiful and completely natural GREEN hue in the light gray host rock!  This is a group of the last of a small lot we purchased from the original collector many years ago.  The ammonites preserve in a stunning three-dimensional form with full delicate chamber detail on the surface.  Ammonites from the source range from a limey-gold to a rich dark blue-green hue caused by unique mineralization in the fossil stone.  These examples are of the rarest rich dark green tone.  This is a set of four examples of typical sizes that were found.

This RARE green Perisphinctes species ammonite from this site in Grafenberg, Germany is sure to please any collector of the unusual.  Out of the few specimens that we were fortunate enough to collect, this is one of the best.  Detail is impeccable and creature has been freed of its surrounding host rock and richly displayed in this glass case.  No restoration and no repair.  Yes, the color is 100% natural!  A unique site and a beautiful specimen for collectors desiring rare and uncommon fossils!

Ammonites are extinct members of the Cephalopod class.  Modern members include nautilus, squid and octopus.  They first appeared during the Silurian Period (435 million to 410 million years ago) and were abundant and widespread in the seas of the Jurassic and Cretaceous periods (175 million to 65 million years ago).  Ammonites are important index fossils—that is, they often link the rock layer in which they are found to specific geological time periods.

Ammonites varied greatly in size.  The largest known as small as 2 cm (0.75 in) in diameter.  During the Jurassic and Cretaceous periods, ammonites evolved more streamlined shells for swimming and the structure of the shell became stronger.  Different shell shapes emerged as well, such as snail-like or uncoiled.   

The shells of ammonites had hollow chambers separated by walls called septa.  A tube called the siphuncle, connected the body with the chambers allowing the animal to fill them with water or air, changing its buoyancy in order to rise or drop in the ocean.  Only the last and largest chamber was occupied by the living animal.  

Ammonites probably lived for one to six years, with the majority living two to four years.  They fed on plankton (tiny free-floating organisms), sea lilies, and smaller orthoceras.  Although many fed off the ocean floor, others may have caught plankton while floating or swimming via jet propulsion, expelling water through a funnel-like opening to propel themselves in the opposite direction.

Because ammonites lived exclusively in marine environments, their presence also indicates the location of prehistoric seas.

SET OF FOUR RARE RICH GREEN SPECIMENS FROM EXCLUSIVE SITE - HIGHLY UNUSUAL COLOR!

1.8" - 1.2" in width

$345     AMX-132     INCLUDES DISPLAY BOX     Actual Item - One Only

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