The Ammonites for Fossil Exhibition - (Reference|Index} Fossils
Ammonites have been understood to humanity for countless years. They are the source of numerous stories and misconceptions. The name of this spiral-shelled cephalopod originates from the Egyptian god Ammon. Ammon was envisioned as a male with the horns of a ram extending 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 mankind for thousands of years. The curled ammonite shells resembled the horns and were called Ammon's Stones or ammonites.
Many cultures throughout history have attributed unique powers to this fossil.
In ancient Greece, it was stated that if you put an ammonite under your pillow it would cure insomnia and bring excellent dreams.
The Romans thought that if you put a golden ammonite (pryritized) under your pillow you would have prophetic dreams.
A Brief History of Ammonites
Ammonites first appeared in the Devonian Period. Ammonites of later durations established septa that had intricate folds called saddles and lobes. Ammonites such as Speetoniceras versicolor are great showcase to a fossil collection often on auction.
Given that all living cephalopods (nautilus, squid, and octopus) are predators, we can This Site assume that ammonites were. The only living cephalopod with an external shell is the chambered nautilus. It can swim and control its depth. It does this by utilizing the siphuncle. The siphuncle is a tube that connects all the chambers in the shell with the living animal. The nautilus can subtract or include gas in these chambers to control buoyancy.
Ammonites have a wide range of size. Early ammonites, till the middle Jurassic, were smaller, generally less than 9 inches or 23 centimeters.
The difficult shell of the ammonite was easily more info here fossilized. This, combined with the large abundance of this group of cephalopods and its evolutionary period through numerous geologic durations, make it a great 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 circulation.
There need to be a lot of them.
It should come from a group that evolves quickly.
They need to be easy to acknowledge.
Ammonites please all of the above requirements easily.
Extinction of The Ammonites
The end of the Cretaceous Period was also the end of the ammonites. Dinosaurs and lots of other types of animals and plants passed away out at about this exact same time.
The curled ammonite shells looked like the look what i found horns and were called Ammon's Stones or ammonites.
Ammonites of later periods established septa that had actually elaborate folds called lobes and saddles. The difficult shell of the ammonite was easily fossilized. If you find an ammonite from a genus understood to be from the Triassic Period, then the rock layer it came from must be Triassic. The end of the Cretaceous Period was also the end of the ammonites.