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Plate Boundaries  and California Plate Boundaries  and California

Plate Boundaries and California - PowerPoint Presentation

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Plate Boundaries and California - PPT Presentation

Chapter 5 The Big Idea California is located on a plate boundary where major geologic events occur Lesson 1 Interactions at Plate Boundaries There are three main types of plate boundaries where stresses cause rocks to deform ID: 500937

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Slide1

Plate Boundaries and California

Chapter 5Slide2

The Big Idea

California is located on a plate boundary, where major geologic events occur.

Lesson 1: Interactions at Plate Boundaries

There are three main types of plate boundaries, where stresses cause rocks to deform.

Lesson 2: California Geology

Many of California’s landforms were produced by plate tectonic activity, which continues today.Slide3

Lesson 1: Interactions at Plate Boundaries

There are three main types of plate boundaries where stresses cause rocks to deform.

What you’ll learn:

Describe types of stress that deform rock.

Relate geologic features of Earth’s surface to types of plate boundaries.

So What?!

Understanding geologic events that occur at plate boundaries can save lives and prevent damage to property.Slide4

Review Vocabulary

Lithospheric Plate:

Large, brittle pieces of Earth’s outer shell composed of crust and uppermost mantle.Slide5

New Vocabulary

Long, narrow valley formed as the hanging wall of a divergent boundary slips down.

rift valley

Fracture in which rocks on one side of the fracture move relative to rocks on the other side.

Boundary formed where plates move apart

Boundary formed when two plates move sideways past each other.

fault

Divergent P.B.

Transform P.B.Slide6

New Vocabulary

Break or crack in rock

Process that pulls apart a continent.

Boundary formed when two plates move toward each other.

fracture

continental rifting

Convergent P.B.Slide7

Academic Vocabulary

inclined

Sloping, slanting, or leaning relative to the horizontal or vertical

The Leaning Tower of Pisa inclines about 3.99 degrees. In

other words,

the

top of the tower is displaced horizontally

12

ft

10

in

from where it would be if the structure were perfectly vertical

. Slide8

Drifting Continents

Rocks are pulled apart; causes stretching and thinning of the lithosphere.

Rocks are pushed together; makes rock layer thick.

Rocks are pushed in opposite directions; neither thickens nor thins lithosphereSlide9

3 Main types of Faults

Normal Fault

Reverse Fault

Strike-Slip FaultSlide10

Summarize It

Rephrase the main ideas of this section in your own words.Slide11

Types of Plate Boundaries

Tension stress causes rocks to break and form normal faults.

The hanging wall slips down and forms a rift valley.

Sequence the events that occur during continental rifting

.Slide12
Slide13

Types of Plate Boundaries

Distinguish 3 types of convergent plate boundaries. Describe what happens at each type of boundary.

Colder, denser slab is forced down, forming a trench; water is released and melts rocks, forming magma.

Denser ocean plate always sinks below continental plate; melting forms a string of volcanoes along edge of continent.

Compression forces force crust to rise, forming tall mountains.Slide14
Slide15
Slide16

Types of Plate Boundaries

Complete this paragraph about transform plate boundaries.

At transform plate boundaries, plates ______________________________. In the ocean, these boundaries connect ________________________.

On the continents, _________________ can occur along these boundaries.

Move sideways past each other

pieces of mid-ocean ridges

large earthquakesSlide17

Summarize It!

Summarize three (3) main ideas of the above sections.Slide18

Lesson 2: Plate Boundaries and California

Many of California’s landforms were produced by plate tectonic activity, which continues today.

What you’ll learn:

Describe California’s current plate tectonic setting and how plate movements have produced landforms.

Predict future changes in California’s tectonic setting and topography.

So What?!

Interactions between the North American Plate and the Pacific Plate produce California’s mountains and basins and cause earthquakes and volcanoes.Slide19

Review Vocabulary

uplift

Any process that moves Earth’s surface to a higher elevation.Slide20

New Vocabulary

San Andreas Fault

The S.A.F. is a transform boundary (and a strike-slip fault) between the N.A. Plate and the Pacific Plate. It extends all the way from Cape Mendocino in the north to the Salton Sea in the south.Slide21

Academic Vocabulary

adjacent

Next to or very near

* The San Andreas Fault is a boundary between two

adjacent

plates.Slide22

Plate Tectonics in California

Distinguish two plate boundaries found in California.

1. The San Andreas Fault System, a

continental transform boundary

cutting across the state.

2. A

convergent plate boundary

offshore in the northern part of the state.Slide23

Plate Tectonics in California

Identify three features of California geology caused by plate tectonics.

1. earthquakes

2. volcanoes

3. mountainsSlide24

Plate Tectonics in California

Create a diagram showing

the San

Andreas Fault.Slide25

Summarize It!

Summarize the main ideas of the above section of the lesson.Slide26

Plate Tectonics in California

Analyze the role of a convergent plate boundary in shaping CA geology.

Melting above the

subduction

zone produces the volcanic mountains in the Cascade Range.Slide27

California’s Mountains

Organize information about the formation of mountains in California.

Subduction

A.

B.

II. Rifting

A.

B.

Granite rocks formed under volcanic mountains when plates converged.

An ancient oceanic plate

subducted

, forming rocks in several mountain ranges.

Tension stresses cause continental rifting.

Panamint Range rises as the crust stretches.Slide28

Future Plate Movements

Summarize two changes that might occur in the future as a result of plate tectonics.

The Pacific Plate will keep moving northwest, bringing Los Angeles and San Francisco closer.

Death Valley and the Gulf of California are dropping and opening up as a result of tension stress.Slide29

Summarize It!

Rephrase the main ideas of the lesson in your own words.