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Sci. 3-2 Relative Dating: Which Came First? Pages 59- 63
A. Relative Dating- determining whether an object or event is older or younger than other objects or events.
B. The Principle of Superposition- states that younger rocks lie above older rocks as long as the rocks have not been disturbed.
C. Geologic Column- an ideal sequence of rock layers that contains all the known fossils and rock formations on Earth arranged from oldest to youngest.
D. Disturbed Rock Layers 1) fault- a break in the Earth’s crust along which blocks of crust slide relative to one another.
2) Intrusion- molten rock that squeezed into existing rock and hardened
3) Folding – when rocks bend and buckle from Earth’s internal forces
4) tilting- when rock layers slant
E.Unconformities- when a layer or several layers of rocks are missing from a rock layer sequence, a gap 1)Means missing time, time not recorded by rock layers
F.Types of Unconformities 1) Disconformity- exists where part of a sequence of parallel rocks layers is missing ( Hard to see, most common)
2) nonconformity- exists where sedimentary rock layers lie on top of an eroded surface of nonlayered igneous or metamorphic rock.
3) angular unconformity- exists between horizontal rock layers and rock layers that are tilted or folded. The tilted or folded layers were eroded before the horizontal layers formed above them.
Earth Systems Chapter Explain how relative dating is used in geology. 2. Explain the principle of superposition. 3. Describe how the geologic column.
R ELATIVE D ATING : W HICH C AME F IRST ? Chapter 6 Section 2.
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Age and Movement of Rocks. How old is old? Relative Dating a method of determining if an object is older or younger than another object.
Relative Dating: Which Came First? Chapter 3 Section 2 p Vocabulary: 1. relative dating 2. superposition 3. geologic column 4. unconformity Rank.
DO NOW (Period 2 & 7 only) Use answer key to make correction to p. 2 in binder DO NOW QUESTION What kind of unconformity is shown below? Explain. Choices:
The Rock and Fossil Record II. Relative Dating: Which Came First?
The Law of Superposition Any method of determining whether an event or object is older or younger than another event. Comparing rock layers or fossils.
Relative Dating: Which Came First? (No we arent talking about dating your cousin even though we live in Alabama. )
Relative and Absolute Dating By: Mr. Meringolo. Before We Begin… Write down the following questions, answer them throughout the powerpoint What is relative.
6.2 Relative Dating: Which Came First? Pgs
Relative Dating Superposition Original Horizontality Faulting Tilting/Folding Intrusions Unconformities Geologic Columns Rock Puzzles.
2 Types. Relative Dating Absolute Dating 1. Law of superposition – youngest layer on top; oldest layer on bottom.
The principle of uniformitarianism Uniformitarionism is a principle that states that the same geologic processes shaping the earth.
Relative Dating (No, not your cousin) Finding the Relative Age of Rocks.
Ch. 13 Section 2 Relative Ages of Rocks. Principle of Superposition The principle of superposition states that in undisturbed layers of rock, the oldest.
Unit 2 Lesson 2 Relative Dating Copyright © Houghton Mifflin Harcourt Publishing Company.
The Relative Age of Rocks Place in order from youngest to oldest A B C D EF.
James Hutton proposed the principle of uniformitarianism. This states that the processes occurring on Earth today, have been occurring since Earth first.
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Earth’s Story 6.1 & James Hutton Theory of the Earth Uniformitarianism.
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The key to the past relative time vs. absolute time relative time order of events or objects from first (oldest) to last (youngest) she is older than he.
Geological Time Dating Absolute and Relative. Geologic Time B y examining layers of sedimentary rock, geologists developed a time scale for dividing up.
Unit 5: Age of the Earth Objective: E5.3D Describe how index fossils can be used to determine time sequence. E5.3g Identify a sequence of geologic events.
Whos First? Copyright © Houghton Mifflin Harcourt Publishing Company What is relative dating? Scientists try to find out the order in which events happened.
Stratigraphy Stratigraphy is the branch of geology that deals with the arrangement of rocks in layers.
May 13, 2014 Open up your ISN. Call the next available left side page #84. Title the page “Vocabulary”. Call the following page #85. Title the page “The.
RELATIVE TIME: When the age of rock is compared to the ages of other rocks or events in geological time. Can determine which layers are older than others.
- What is Relative Dating ? Relative Dating is determining whether an object or event is older or younger than other objects or events.
Interpreting Earth’s Rocks to Determine Its Past History.
Earth Science Notes Relative Age of Rocks. Objectives I can… Distinguish relative and absolute dating. Describe the 6 laws of relative dating. Use the.
Determining geological ages ◊Relative age dates – placing rocks and events in their proper sequence of formation ◊Numerical dates – specifying the actual.
I can: describe methods used to assign Relative ages of rock layers Do Now: 1.How are sedimentary rocks formed? 2.Which fossil is the index fossil From.
Relative Dating By: Thomas Cardona, Cameron Carpenter, Cielo Ruvalcaba, Madison Gasper, Caroline Kelsey, Bryson Probert.
Uniformitarianism- Principle that states that the same geological process shaping the Earth today have been at work throughout Earth’s history. Examples:
Earth’s History Introduction: The earth is about 4.6 billion years old. Much of its history is recorded in the rock. Observations of fossils, rock types,
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CHAPTER 9: Clues to Earths past Section 3: Relative Ages of Rocks.
Interpreting Earth’s Rocks to Determine Its Past History Geologic time Relative dating.
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Geologic Time, Unconformities and Relative Dating Uniformitarianism Appendix A.
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