Question

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?

Answer 1

Answer:

Cambrian

Explanation:

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.