The Oldest,easily Identifiable Fossils Appear in Sedimentary Rocks That Formed

question 23

Short Answer

The oldest,easily identifiable fossils appear in sedimentary rocks that formed 500 million to 600 million years ago during the ____________________ period.

---

Definitions:

Whites-Only Primaries

Electoral processes in certain American states, up until the mid-20th century, that excluded African Americans from voting in primary elections.

Discriminatory Hiring Practices

Employment practices that unfairly single out individuals or groups for different treatment based on biased or prejudiced beliefs against certain characteristics.

Internal Security Act

is a 1950 Act of Congress, also known as the McCarran Act, aimed at protecting the United States against communist activities.

Communist-Front Organizations

Groups or entities that are ostensibly independent but actually controlled by a communist party, often created to advance communist agendas under the guise of other social or political objectives.