Consider the geologic time scale. A scientist discovered two fossils. Fossil A is from the Triassic time period. Fossil B is from the Cambrian time period. Which one is older? Why?
The fossil from the Cambrian is older than the one from the Triassic. This is because in the geologic time scale, the Cambrian is older than the Triassic.
Absolute age of the Cambrian is between 541 - 484mya
It is the first geological period in the Paleozoic era.
The Triassic is the earliest period of the Mesozoic era
It occurred about 237mya ago.
Therefore, the fossils which corresponds to the Cambrian is the oldest.
