112-pp7 - UNIVERSITY OF SOUTH ALABAMA Last time we covered...

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1 GY 112: Earth History Introduction to Dating UNIVERSITY OF SOUTH ALABAMA Last time we covered… 1. William Smith (AKA Strata Smith) 2. Stratigraphic Principles 3. Geological Time and the Geological Time Chart William “Strata” Smith: He used fossils and his knowledge of geology to make the first detailed geological map of Great Britain Affectionately called “The Map” Clever thinkers: 1769-1839 Formation: a lithologically distinct rock unit that possesses recognizable upper and lower contacts with other units and which can be traced across the countryside from place to place. Member: an important “unit” but one not quite meeting the requirements of a formation Group: a collection of similar type formations Source: 3dparks.wr.usgs.gov/coloradoplateau/images/bryce_strat.jpg Stratigraphic Nomenclature Corso Group Today’s Agenda 1. Why geologists date 2. Relative vs. Absolute Dating Techniques 3. Magnetostratigraphy 4. Fission Track Dating
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2 Lecture 7: Introduction to Dating (Web Lecture 7) Dating Source: http://academic.brooklyn.cuny.edu/geology/leveson/core/topics/time/graphics/history1e.gif
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