Download presentation
Presentation is loading. Please wait.
Published bySara Montgomery Modified over 9 years ago
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
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.