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

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Presentation on theme: "Relative Dating Superposition Original Horizontality Faulting Tilting/Folding Intrusions Unconformities Geologic Columns Rock Puzzles."— Presentation transcript:

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

2 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

3 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.

4 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

5 FaultingCross Cutting Folding Unconformity

6 Faulting Intrusions

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

8 IV. Geochronology - Key

9 V. GEOLOGIC COLUMNS An ideal sequence of rock layers that contain all fossils and rock formations on Earth arranged from oldest to youngest.

10 MICHIGANS GEOLOGIC COLUMN: How did geologist get this information?

11 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


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