Geologic Time Scale.

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Geologic Time Scale

Homework Create Unconformity Foldable: Include Drawing and Real-life picture of each; Description of the types of rocks and their locations; 2 additional facts (Sept 7) Create a study cards for last week notes Prepare for Quiz on this Friday (September 7) Complete Essential Question by Sept 10

Guided Questions What are the geological unit of time from smallest to largest? What is one major event that occurred during the Precambian Era? What is one major event that occurred during the Paleozoic Era? What is one major event that occurred during the Mesozoic Era? What is one major event that occurred during the Cenozoic Era?

Now let’s figure out how we did??? Draw a line under what we just did…the next pages are NOTES!

What is the geologic time scale? Time-line of Earth’s history Breaks down Earth’s history into units of time

Eras are the largest unit of time. Ex: Precambrian Paleozoic Mesozoic Cenozoic Eras are divided into smaller parts called periods. Periods are then divided into even smaller parts called epochs.

Era Period Epoch

Precambrian Earliest span of time in Earth’s history. No life for a long time and then very simple life appears. Early life influenced by volcanoes and mountain building

Paleozoic Era Took place after Precambrian. Early invertebrates and amphibians, “Age of Fishes”. Tropical climates allowed growth of new species Mass extinction at end most marine invertebrates disappeared.

Mesozoic Era Took place after Paleozoic Era. Reptiles, small mammals, and small birds. “Age of Reptiles” -dinosaurs, etc Late mass extinction by asteroid or climate change that caused dinosaurs to go extinct.

Cenozoic Era The Era we are currently in!!! Mammals, flowering plants, humans. “Age of Mammals” We still have much diversity but could there be a mass extinction to come???

Rebuild the Cliff Which is the oldest layer of rock? How can you tell? What is the oldest fossil? Hoe do you know? What great event probably occurred in the area? How can you tell? Arrange the fossils in order of their appearance in the rock record?