Yes, ammonites are good index fossils because they had a wide geographical distribution and existed for a long period of time. Their evolution is well-documented, making them useful for relative dating of rock layers.
Ammonites are commonly used as index fossils for the Mesozoic era. These marine cephalopods had distinctive shell shapes and were widespread during the Mesozoic, making them useful for dating and correlating rock layers.
Short spans of geologic time
Ammonites first appeared during the Devonian Period within the Paleozoic Era.
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.
* the organism must be common in rocks from most of the world *the organism must have lived for only a geologically short period of time( a few million years to a few hundred million years) *the organism must be easy to identify.(trilobites and ammonites are 2 kinds of organisms that are used as index fossils).
Ammonites are commonly used as index fossils for the Mesozoic era. These marine cephalopods had distinctive shell shapes and were widespread during the Mesozoic, making them useful for dating and correlating rock layers.
Short spans of geologic time
yes
in rocks you smash
ammonites are extinct
Africa
the lab in cinnabar
like twice
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.
fossels.
At the Pewter City Museum.