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Abundant fossil evidence did not appear in the geologic record until what geologic era?
Abundant and diverse fossils first appeared in the Cambrian era, although there is fossil evidence throughout much of the Precambrian.
The sum of all the fossils that exist is called the?
The sum of all the fossils that exist is called that fossil record. It includes fossils from all geologic time periods.
Why is the Cambrian period a key period in the geologic record?
Because it disproves evolution. Lots of fossils suddenly appearing of fully formed animals. Points to the creator God.
Was Africa the first continent that people appeared on?
That is correct. The fossil record shows that human fossils appear in Africa long before they appear anywhere else.
How are fossils organized in the fossil record?
Paleontologists look for index fossils in fossil bearing sedimentary rock. Index fossils are organisms that were widespread, rapidly evolving, and only existed for a short period of time as evidenced by their appearance in the fossil record of specific rock strata. The appearance of a fossil alongside an index fossil gives a rough approximation of the age of the fossil in relative terms as it would appear on the geologic time scale. The appearance of the same fossil alongside index fossils of different geologic ages means that the fossil organism spanned multiple geologic time periods. Associations of specific strata alongside radiographically datable igneous and metamorphic rock determines the absolute age of a fossil.
Did mammals appear in the fossil record after dinosaurs became extinct?
No, mammals lived alongside dinosaurs and their earliest known fossils of about 200 million years old are almost contemporary with the early dinosaur fossils.
What is called the record of life forms and geologic events in earth's history?
the record of life forms and geologic events in earth's history is actually called the "Geologic time scale" fine sir. good day
Abundant fossil evidence did not appear in the geologic record until about?
The abundant fossil evidence appeared in the geologic record around 541 million years ago during the Cambrian period when complex organisms started to evolve. This sudden appearance of diverse life forms is known as the Cambrian explosion.
Are fossils records complete or incomplete?
Fossil records are not complete. By some estimates, less than 1% of organisms that have lived appear in the fossil record.
What are graptolites?
Graptolites are extinct colonial marine organisms that lived from the Cambrian to the Carboniferous period, around 540 to 320 million years ago. They had a unique structure resembling tiny "tuning forks" and were important index fossils used for dating and correlating rock layers in geological studies.
The record of life forms and geologic events in Earth's history is called?
the record of life forms and geologic events in earth's history is actually called the "Geologic time scale" fine sir. good day
When did abundant fossil evidence appear in the geologic record?
Abundant fossil evidence first appeared in the geologic record during the Cambrian Period, around 541 million years ago. This period marked the rapid diversification of multicellular organisms, leading to the Cambrian Explosion, which left behind a rich fossil record of early marine life.
