Event Eon Era Period Epoch

(whereapplicable)

First Organisms withshells

First InsectFossils

First Reptiles

First FloweringPlants

“Age of Mammals”

Identify the Geologic time periods - Eon-Era-Period- Epoch (where applicable) for the following events. - Refer to Chapter 13 slides- Answers need to include Ma (Million years ago) range in addition to the names of time period First multicelled organisms Precambrian Eon Phanerozoic 542 Mal Era Period Cenozoic Epoch Quaternary 0.01 Ma 2.6 Mat Neogene 5.3 Ma Paleogene 65.5 Ma Tertiary Holocene The present Pleistocene Humans develop Pliocene Miocene "Age of Mammals" 23.0 Ma 33:9 Ma 55.8 Ma Oligocene Eocene Paleocene Extinction of dinosaurs and many other species Cretaceous Proterozoic Mesozoic 145.5 Ma Jurassic 199.6 Ma Triassic 251.0 Ma Permian 2500 299.0 Ma Ma First flowering plants First birds and mammals Pennsylvanian First dinosaurs Extinction of trilobites and many other marine animals First reptiles 318.1 Ma First one-celled organisms Mississippian Archean Amphibians abundant 359.2 Ma Paleozoic First insect fossils Devonian Fishes dominant 4000 Ma 416.0 Ma 443.7 Ma Silurian First land plants Hadean Ordovician First fishes 488.3 Ma Origin of Earth 4600 Mal Cambrian Trilobites dominant First organisms with shells 542.0 Ma 2011 Pearson Education, Inc.