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GEOL 11040 Lecture 31: How the Earth Works 12/6/18
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December 6, 2018 Humans have become the primary cause of the Earths changes We are adding a unique record to the geological history: Litter such as aluminum cans Items we have produced w...

Geology
GEOL 11040
Christopher Rowan
GEOL 11040 Lecture Notes - Lecture 30: Last Glacial Maximum, Snowball Earth, Cryogenian
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December 4, 2018 Climate change in the Anthropocene The Earths climate has changed in the past It has been much warmer in the past It has also been significantly colder The Snowball Earth In cryogenian period About 635 mil...

Geology
GEOL 11040
Christopher Rowan
GEOL 11040 Lecture Notes - Lecture 29: Road Salt, Magma Chamber, Crystallization
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Mineral Resources Many economically important minerals are metallic Hematite Galena Other economically important minerals include Road Salt Limestone Metallic resources often come in the form of ores Ore: rock composed of ...

Geology
GEOL 11040
Christopher Rowan
GEOL 11040 Lecture Notes - Lecture 28: Source Rock
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November 27, 2018 Geological Resources What is a geological resource? Something from the earth that we can put to use They are created by geological processe...

Geology
GEOL 11040
Christopher Rowan
GEOL 11040 Lecture Notes - Lecture 25: Closure Temperature, Absolute Dating, Crystallization
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November 15, 2018 Relative ages Can provide detailed sequence of events Cannot give EXACT ages or time frames Absolute ages Come from measuring proportions of radioactive parent isotopes Not necessarily more useful than re...

Geology
GEOL 11040
Christopher Rowan
GEOL 11040 Lecture Notes - Lecture 24: Sea Level
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November 13, 2018 Building Geological Histories Rocks are different depending on the time or area in which they formed The Earth changes constantly Scotland used to be hot and arid - 350 million years ago Oman used to be c...

Geology
GEOL 11040
Christopher Rowan
GEOL 11040 Lecture 23: How the Earth Works 11/8/2018
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November 8, 2018 Types of Landslides Classification based on: Types of material Rock Regolith Ice Velocity of movement Fast to slow Type of motion Slide Coherent block Flow Incoherent - loose particles Behaves like fluid e...

Geology
GEOL 11040
Christopher Rowan
GEOL 11040 Lecture Notes - Lecture 22: Cascadia Subduction Zone, San Andreas Fault, Seismic Hazard
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November 6, 2018 Small earthquakes can indicate where strain is accumulating Can also indicate where a larger rupture is possible in the future We only have a century of earthquakes that have been recorded by seismometers ...

Geology
GEOL 11040
Christopher Rowan
GEOL 11040 Lecture Notes - Lecture 21: Epicenter, Seismometer, Foreshock
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November 1, 2018 What makes earthquakes deadly? Does magnitude predict casualties? Magnitude is a factor, but there are a lot of more important things to know when predicting casualties How are the buildings built? Ex: a m...

Geology
GEOL 11040
Christopher Rowan
GEOL 11040 Lecture 19: How the Earth Works 10/30/18
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October 30, 2018 The water cycle and sediment transport are directly linked Precipitation moves sediment Sediment is moved to a body of water Water evaporates Leaves sediment behind in a place different from where it start...

Geology
GEOL 11040
Christopher Rowan
GEOL 11040 Lecture 19: How the Earth Works 10/25/18
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October 25, 2018 Igneous and sedimentary rocks transform into metamorphic rocks Metamorphism: redistribution and transformation of rocks within the earth Sedimentary: redistribution and tr...

Geology
GEOL 11040
Christopher Rowan
GEOL 11040 Lecture Notes - Lecture 9: Metamorphic Rock, Transform Fault, Subduction
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October 20,2018 Igneous rocks: interlocked minerals crystallized by lava Made where rocks melt Rifts Subduction zones Hotspots S...

Geology
GEOL 11040
Christopher Rowan
GEOL 11040 Lecture Notes - Lecture 17: Facies, Stalagmite, Geochemistry
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October 18, 2018 Review: Due to weathering, transported clastic grains are modified It is easy to tell an ice-born sediment apart from others because of its rare, angular form Water transports the most sediment When sedime...

Geology
GEOL 11040
Christopher Rowan
GEOL 11040 Lecture Notes - Lecture 7: Oceanic Crust, Surface Plate, Continental Drift
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September 13, 2018 Plates and Plate Boundaries A tectonic plate is made up of both crust and rigid mantle lithosphere moving on top of the plastic asthenosphere Plate boundaries are where the majority of Earths geological ...

Geology
GEOL 11040
Christopher Rowan
GEOL 11040 Lecture Notes - Lecture 16: Clay Minerals, Cross-Bedding, Diamictite
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October 16, 2018 Source: where weathering physically and chemically disassembles old rock Sink: where clastic sediment and dissolved ions are reassembled into new sedimentary rock How does sediment get from source to sink?...

Geology
GEOL 11040
Christopher Rowan

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