Divide each of these into ten 10,000,000 year increments. The students should label the range of time indicated on the Life Time Line. Teams should illustrate their geologic period with representative life forms by looking at various picture books on dinosaurs and prehistoric life. Period Time Span Events Quaternary Present to 3 million years ago. Tertiary 3 million to 63 million years ago.
Mammals are abundant and diverse and are the dominant animal life form.
Cretaceous 63 million to 135 million years ago. First flowering plants evolve. Jurassic 135 million to 180 million years ago. First birds and mammals evolve. Age of dinosaurs and ammonites.