Geology 101 Introduction to Geology ... - Canyon Ministries · Geology 101 Introduction to Geology...
Transcript of Geology 101 Introduction to Geology ... - Canyon Ministries · Geology 101 Introduction to Geology...
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Geology 101 Introduction to Geology for the
Christian Leaders Grand Canyon Trip
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1. How do we do science?
Brand, L. 1997. Faith Reason and Earth History. Andrews University Press, Berrien Springs, MI. Brand, L. 2006. A Biblical perspective on the philosophy of science. Origins, no. 59, p. 6-42.
For Further Reading:
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The “Conventional” view of earth history
The Creation Geology view of earth history
“Precambrian”
Paleozoic
Mesozoic
Cenozoic
Years before present
~6,000
~4,344
~4,343
Today Today
66 million
245 million
542 million
4,600 million
Time Periods of Earth History
The Great Unconformity
Cambrian Period
Bacteria were the only life forms during this time. No
other fossils.
These rocks represent Creation Week & Pre-Flood rocks. Conditions for fossilization not generally present.
Rocks made during Noah’s Flood
Post-Flood Rocks
Trilobites, marine fossils, coal
Dinosaurs
Mammals The Ice Age
See Garner, 2008, Time for an upgrade?, Answers Magazine, v.
4, p. 49.
TIM
E
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“Precambrian”
Paleozoic
Mesozoic
Cenozoic
Years before present
~6,000
~4,344
~4,343
Today
4,600 million
Time Periods of Earth History
The Great Unconformity
Cambrian Period
Rocks made during Noah’s Flood
Post-Flood Rocks The Ice Age
Grand Canyon Rocks
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2. Rocks & Minerals
Minerals Rocks are made of one
or more minerals
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3. The Three Main Types of Rocks
Sedimentary Shale Sandstone Limestone
Igneous Granite Basalt Diabase
Metamorphic Schist Gneiss Marble
Igneous Metamorphic
Sedimentary
Rocks made of crystals
Rocks made of little pieces of other rocks
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Sedimentary Rocks
Lots of layers, water-laid Only kind of rocks to
contain fossils
Clastic Conglomerate, Sandstone,
Siltstone, Shale
Chemical Rock salt, travertine limestone
Organic Limestone, coal
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Sedimentary rocks
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Layers, strata, beds, cross-beds
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Sedimentary rocks
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Sedimentary rocks
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Sedimentary rocks
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Igneous Rocks
Crystalline, have all cooled from a liquid Basalt, granite, diabase
Volcanic-- where the magma (lava) cools above
ground basalt
Intrusive-- where the magma cools underground Granite, diabase
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Igneous rocks
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Igneous rocks
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Igneous rocks
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Igneous rocks
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Metamorphic Rocks
These are also crystalline rocks Rocks that have been changed by heat and/or
pressure Start with one type of rock and end up with another
(Romans 12:1-2) Change occurs without melting anything
An example: metamorphism of a shale Shale slate phyllite schist gneiss melt
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Metamorphic rocks
Slate Phyllite
Schist Gneiss
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4. Dating of rocks
Relative Dating Superposition Cross-cutting relationships
Absolute (Radiometric) Dating Can only be done with crystalline rocks (igneous &
metamorphic)
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Dating of rocks
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Dating of rocks
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Dating of rocks
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HOW DOES RADIOACTIVE DATING WORK?
A rock with orthoclase (KAlSi3O8)
A zircon crystal (ZrSiO4)
A bone with 14C
40K 40K
40K 40K 40K
40K
238U
238U
238U
238U
238U
238U
40K 40K
40K 40Ar 40Ar
40Ar
206Pb
238U
238U
206Pb
206Pb
238U
TIME
½ life of 40K = 1.3 Ga
½ life of 238U = 4.5 Ga
½ life of 14C = 5,730 years
What assumptions must be made?
1. Constant rate of
decay
2. Starting conditions
3. Closed system (no gain/loss of ingredients)
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5. Faults
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Faults
Graben
Horst
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6. Folds
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5. Folds
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Folds
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7. Unconformities
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Unconformities
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The development of
an angular unconformity.
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8. volcanoes
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9. Mass Wasting
Landslides Avalanches Mud flows Debris flows Slumps
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Mass Movements
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10. Plate Tectonics Fit of continents Fossil patterns across oceans Structural patterns across oceans Rock patterns across oceans Geometry of ocean floor Location of earthquakes, trenches,
mountains, volcanos Volcanic island chain patterns
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Motion at Plate Boundaries