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Relative Dating Superposition Original Horizontality Faulting Tilting/ Folding Intrusions Unconformitie s Geologic

Relative Dating Superposition Original Horizontality Faulting Tilting/Folding Intrusions Unconformities Geologic Columns Rock Puzzles

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Page 1: Relative Dating Superposition Original Horizontality Faulting Tilting/Folding Intrusions Unconformities Geologic Columns Rock Puzzles

Relative DatingSuperposition

Original Horizontality

Faulting

Tilting/Folding

Intrusions

Unconformities

Geologic Columns

Rock Puzzles

Page 2: Relative Dating Superposition Original Horizontality Faulting Tilting/Folding Intrusions Unconformities Geologic Columns Rock Puzzles

I. RELATIVE DATING: Determining whether an object or an event is older or younger than other objects or events.

Relative Age?

• Layer 1

• Layer 2

• Layer 3

• Layer 4

Page 3: Relative Dating Superposition Original Horizontality Faulting Tilting/Folding Intrusions Unconformities Geologic Columns Rock Puzzles

II. SUPERPOSITION: Younger rock lie above older rock.

List the rocks in order from youngest to

oldest!

A. Law of Original Horizontality – Sedimentary rocks form layers of horizontal strata.

Page 4: Relative Dating Superposition Original Horizontality Faulting Tilting/Folding Intrusions Unconformities Geologic Columns Rock Puzzles

III. Disturbed Rock Layers: Events are younger than the rock layers

A. Faulting – a break in the Earth’s curst where one rock layers will slide

B. Intrusions – when molten rock squeezes into existing rock and cools

C. Folding & Tilting – When internal forces bend or tilt rock layers

D. Unconformities – a surface that represents an area where there is a missing piece of geologic rock

Page 5: Relative Dating Superposition Original Horizontality Faulting Tilting/Folding Intrusions Unconformities Geologic Columns Rock Puzzles

FaultingCross CuttingFolding

Unconformity

Page 6: Relative Dating Superposition Original Horizontality Faulting Tilting/Folding Intrusions Unconformities Geologic Columns Rock Puzzles

Faulting

Intrusions

Page 7: Relative Dating Superposition Original Horizontality Faulting Tilting/Folding Intrusions Unconformities Geologic Columns Rock Puzzles

IV. Geochronology - the science of dating and determining the time sequence of events in the history of the Earth.

Page 8: Relative Dating Superposition Original Horizontality Faulting Tilting/Folding Intrusions Unconformities Geologic Columns Rock Puzzles

IV. Geochronology - Key

Page 9: Relative Dating Superposition Original Horizontality Faulting Tilting/Folding Intrusions Unconformities Geologic Columns Rock Puzzles

V. GEOLOGIC COLUMNS

An ideal sequence of rock layers that

contain all fossils and rock formations on Earth arranged

from oldest to youngest.

Page 10: Relative Dating Superposition Original Horizontality Faulting Tilting/Folding Intrusions Unconformities Geologic Columns Rock Puzzles

MICHIGANS GEOLOGIC COLUMN: How did geologist get this information?

Page 11: Relative Dating Superposition Original Horizontality Faulting Tilting/Folding Intrusions Unconformities Geologic Columns Rock Puzzles

MICHIGAN BASIN

• Originally shaped like a bowl

• Great sea covered MI during Paleozoic Era

• Layers formed from 24 – 30 retreats and transgressions of water or oceans

• Information taken from core samples

http://www.geo.msu.edu/geo333/MIbasin.html