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This Is Planet Earth Dr Liam Herringshaw (Email – lgh865@hotmail.com)lgh865@hotmail.com An Introduction To Geology
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In the beginning Introducing me, the course, yourselves
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About me
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About the course Class 1. Beginnings...of Geology...of the Earth
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2. Time Fossil time Absolute time
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3. Fire Magmas, Volcanoes & Igneous Rocks
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4. Sand, Mud & Lime Sedimentary rocks Depositional environments
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5. Folds & Faults Metamorphic rocks Structural geology
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6. Moving Plates
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7. Ice & Water Glaciology & Hydrogeology
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8. Life & Death Fossils and Evolution
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9. Mines & Yours Economic geology Minerals, oil, gas Human impacts
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10. The Future
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Over to you... What do you already know? What do you want to find out? What geological topics interest you most?
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Course information No class Tuesday May 6 th Extra class at end of course (July 1 st ) Course notes on www.fossilhub.orgwww.fossilhub.org
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No vestige of a beginning, no prospect of an end
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1726-1797 “The Father of Geology” Deep Time and Plutonism James Hutton
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Deep Time Hutton's Unconformity
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Neptunism vs Plutonism All rocks deposited from water All rocks hot from the underworld
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Catastrophism vs Uniformitarianism Change by revolution Floods, extinctions, ice ages... Gradual change The present is the key to the past
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Geological science The Principles of Geology (1830-1833) X religious X philosophical X anthropocentric
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A second Charles “I, a geologist...” Reefs + sea levels Volcanic islands Fossils
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Other key figures A course in itself! AnningWegenerSmith
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Beginnings of Earth Radiometric dates from meteorites Formed ~4.54 Ga (billion years ago)
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Our ancient Moon Genesis Rock: ~4.1 billion years old
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Oldest thing on Earth? Zircon, Western Australia, ~4.4 Ga
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Oldest rocks? Hudson Bay, Canada, 4.28 Ga
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Oldest rocks in Britain Lewisian complex, 3.1 to 1.7 Ga
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Inhabitable early Earth?
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Beginnings of life Archaean bacteria, W. Australia
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Very simple for a very long time
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Beginnings of animal life
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Next week Geological time www.fossilhub.org
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