The Oldest Easily Identifiable Fossils Appear in Sedimentary Rocks That

question 24

Short Answer

The oldest easily identifiable fossils appear in sedimentary rocks that formed 3.4 billion years ago during the ____________________ period.

---

Definitions:

Hollow Skeleton

A structural feature in some organisms, such as birds, where bones are lightweight yet strong due to being hollow, facilitating flight.

Small Teeth

Dental features that are smaller in size; this can relate to various animals, including humans, depending on genetic, dietary, or evolutionary factors.