The Ammonites for Fossil Collection - (Reference|Index} Fossils



Ammonites have actually been understood to mankind for thousands of years. They are the source of lots of stories and misconceptions. The name of this spiral-shelled cephalopod originates from the Egyptian god Ammon. Ammon was visualized as a guy with the horns of a ram protruding from his head. The curled ammonite shells looked like the horns and were called Ammon's Stones or ammonites. Ammonites have actually been known to humanity for thousands of years. The curled ammonite shells looked like the horns and were called Ammon's Stones or ammonites.

Ammonite Myths
Numerous cultures throughout history have actually associated special powers to this fossil.

In ancient Greece, it was stated that if you put an ammonite under your pillow it would treat sleeping disorders and bring great dreams.

If you put a golden ammonite (pryritized) under your pillow you would have prophetic dreams, the Romans believed that.

A Brief History of Ammonites
Ammonites first appeared in the Devonian Period. Ammonites of later periods established septa that had detailed folds called lobes and saddles. Ammonites such as Speetoniceras are highly collectible fossils often on auction.

Considering that all living cephalopods (squid, nautilus, and octopus) are predators, we can presume that ammonites were. The only living cephalopod with an external shell is the chambered nautilus. The siphuncle is a tube that links all the chambers in the shell with the living animal.

Ammonite Size
Ammonites have a large variety of size. Early ammonites, till the middle Jurassic, were smaller sized, generally less than 9 inches or 23 centimeters.

Biostratigraphy
The tough shell of the ammonite was quickly fossilized. This, combined with the large abundance of this group of cephalopods and its evolutionary period through several geologic durations, make it an excellent index fossil. If you find an ammonite from a genus known to be from the Triassic Period, then the rock layer it came from need to be Triassic.

It should have wide distribution.

There need to be a great deal of them.

It must come from a group that develops quickly.

They should be easy to acknowledge.

Ammonites satisfy all the above criteria quickly.

Extinction of The Ammonites
Completion of the Cretaceous Period was also completion of the ammonites. This was about 65 million years earlier. Dinosaurs and numerous other types of plants and animals passed away out review at about this exact same time. It is believed that a big meteor hitting earth caused these mass terminations.

The curled ammonite shells looked like the horns and were called Ammon's Stones or ammonites.

Ammonites of later periods established septa that had detailed folds called lobes and saddles. The difficult shell of the ammonite was quickly fossilized. If you find an ammonite from a genus known to be from the Triassic Period, informative post then the rock layer it came from need to be Triassic. The end of the Cretaceous Period try this out was also the end of the ammonites.

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