This Is Planet Earth Dr Liam Herringshaw ( – An Introduction To Geology.

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Presentation transcript:

This Is Planet Earth Dr Liam Herringshaw ( – An Introduction To Geology

In the beginning Introducing me, the course, yourselves

About me

About the course Class 1. Beginnings...of Geology...of the Earth

2. Time Fossil time Absolute time

3. Fire Magmas, Volcanoes & Igneous Rocks

4. Sand, Mud & Lime Sedimentary rocks Depositional environments

5. Folds & Faults Metamorphic rocks Structural geology

6. Moving Plates

7. Ice & Water Glaciology & Hydrogeology

8. Life & Death Fossils and Evolution

9. Mines & Yours Economic geology Minerals, oil, gas Human impacts

10. The Future

Over to you... What do you already know? What do you want to find out? What geological topics interest you most?

Course information No class Tuesday May 6 th Extra class at end of course (July 1 st ) Course notes on

No vestige of a beginning, no prospect of an end

“The Father of Geology” Deep Time and Plutonism James Hutton

Deep Time Hutton's Unconformity

Neptunism vs Plutonism All rocks deposited from water All rocks hot from the underworld

Catastrophism vs Uniformitarianism Change by revolution Floods, extinctions, ice ages... Gradual change The present is the key to the past

Geological science The Principles of Geology ( ) X religious X philosophical X anthropocentric

A second Charles “I, a geologist...” Reefs + sea levels Volcanic islands Fossils

Other key figures A course in itself! AnningWegenerSmith

Beginnings of Earth Radiometric dates from meteorites Formed ~4.54 Ga (billion years ago)

Our ancient Moon Genesis Rock: ~4.1 billion years old

Oldest thing on Earth? Zircon, Western Australia, ~4.4 Ga

Oldest rocks? Hudson Bay, Canada, 4.28 Ga

Oldest rocks in Britain Lewisian complex, 3.1 to 1.7 Ga

Inhabitable early Earth?

Beginnings of life Archaean bacteria, W. Australia

Very simple for a very long time

Beginnings of animal life

Next week Geological time