Ammonites first appeared during the Devonian Period within the Paleozoic Era.
The eon after the Hadean Eon is the Archean Eon. During this eon, significant geological and biological events took place, leading to the development of early life forms on Earth.
Ammonites are considered body fossils because they are the preserved remains of an organism that lived millions of years ago. Trace fossils, on the other hand, are evidence of the activities of ancient organisms, such as footprints or burrows.
Phanerozoic.
The dinosaurs existed during the Mesozoic Era within the Phanerozoic Eon.
5th Edit: The ancient Greeks referred to an eon as being an eternity, so by that definition, we would be in the one and only eon, but in geology, an eon amounts to about 1 billion years, making the Earth be 4.6 eons old, so, the answer would either be the first eon, or the 5th eon. Depends on how you look at it.
ammonites are extinct
Ammonites are named for the Egyptian god Ammon, who had a ram's head. The shells of ammonites are spirals like the horns of a ram.
Various aquatic reptiles were predators of ammonites. Fossils of damaged ammonites have been found with teeth marks from Plesiosaurs.
The eon after the Hadean Eon is the Archean Eon. During this eon, significant geological and biological events took place, leading to the development of early life forms on Earth.
Squid
I am currently in the Phanerozoic Eon.
I don't know the plural of eon but the answer is more than 1 eon
Ammonites went extinct at the end of the Cretaceous Period.
Ammonites went extinct at the same time as the dinosaurs, about sixty-five million years ago.
Ammonites are very common fossils from the Jurassic Period. They were dominant in the ocean during and before the Jurassic Period.
Ammonites are the most widely-known and abundant fossils in the world. The name "ammonites" came from the Greek god Ammon. Ammonites include squid, octopus, snails, cuttlefish, and nautilus.
ammonites