01-geologic-time

01-geologic-time - Introduction to Geologic Time 460:206:01...

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Unformatted text preview: Introduction to Geologic Time 460:206:01 DINOSAURS Nicolas Steno Stratigraphy • Strata = layers of rock • Stratigraphy- the study of the rock layers • Based on 3 basic Laws of Stratigraphy Steno’s Principles of Stratigraphy Original Horizontality Steno’s Principles of Stratigraphy Superposition Steno’s Principles of Stratigraphy Faunal (Floral) Succession Based on First and Last Appearances of Fossils and Trace Fossils • First Appearance- When something evolved • Last Appearance- When something went extinct • Trace Fossil- Organism that lives for a brief period of time What are fossils?? Why do we care? • Paleontology- the study of fossils • Why do paleontologists study fossils? • What can fossils tell us about the past? – They tell us two main things. What do these fossils tell us? What do these fossils tell us? Two Types of Fossils Body Fossils Trace Fossils Index Fossil- Trilobites...
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01-geologic-time - Introduction to Geologic Time 460:206:01...

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