intro
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Objective 10/14/2011. Describe the three major types of folds and faults by modeling them. Intro. Does rock bend or break or both?. Deforming the Earth’s Crust. Folds. Folding – the bending of rock layers due to stress. Folds:. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/1.jpg)
Intro
Objective 10/14/2011Describe the three major types of folds and faults by modeling them.
Does rock bend or break or both?
![Page 2: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/2.jpg)
Deforming the Earth’s Crust
![Page 3: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/3.jpg)
Folds Folding –
the bending of rock layers due to stress
![Page 4: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/4.jpg)
Folds:
Take the layered clay in both hands, and slowly bend upwards (do not break the clay!) until a fold appears. Draw what you see:
![Page 5: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/5.jpg)
Folds:
Take the layered clay in both hands, and slowly bend upwards (do not break the clay!) until a fold appears. Draw what you see:
![Page 6: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/6.jpg)
Folds: Anticline –
upward arching folds
![Page 7: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/7.jpg)
Folds:
Take the layered clay in both hands, and slowly bend downwards (do not break the clay!) until a fold appears. Draw what you see:
![Page 8: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/8.jpg)
Folds:
Take the layered clay in both hands, and slowly bend downwards (do not break the clay!) until a fold appears. Draw what you see:
![Page 9: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/9.jpg)
Folds: Synclines –
down-ward folds
![Page 10: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/10.jpg)
Folds:
Take the layered clay in both hands. While keeping both hands horizontal, move one hand upwards slowly, until a new fold appears. Be careful not to break the clay! Draw what you see:
![Page 11: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/11.jpg)
Folds:
Take the layered clay in both hands. While keeping both hands horizontal, move one hand upwards slowly, until a new fold appears. Be careful not to break the clay! Draw what you see:
![Page 12: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/12.jpg)
Folds: Monocline –
rock layers are folded so that both ends of the fold are horizontal
![Page 13: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/13.jpg)
Faults Fault – a
break in a body of rock along which one block slides relative to another
![Page 14: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/14.jpg)
Faults
With each piece of clay in your hands, model a normal fault by moving your right hand downwards and your left hand upwards. Draw what you see:
![Page 15: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/15.jpg)
Faults
With each piece of clay in your hands, model a normal fault by moving your right hand downwards and your left hand upwards. Draw what you see:
![Page 16: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/16.jpg)
Faults Normal
Fault – causes the hanging wall to move down relative to the footwall
![Page 17: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/17.jpg)
Faults
With each piece of clay in your hands, model a reverse fault by moving your right hand upwards and your left hand downwards. Draw what you see:
![Page 18: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/18.jpg)
Faults
With each piece of clay in your hands, model a reverse fault by moving your right hand upwards and your left hand downwards. Draw what you see:
![Page 19: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/19.jpg)
Faults Reverse
Fault – causes hanging wall to move up relative to the footwall
![Page 20: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/20.jpg)
Faults
When rocks are pulled apart
One slab of rock slides DOWNWARD
When rocks are pushed together
One slab of rock slides UPWARD
Normal Fault Reverse Fault
![Page 21: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/21.jpg)
Faults
With each piece of clay set on the table in front of you, model a strike-slip fault by pushing one piece of clay forward while pulling the other piece towards you. Draw what you see.
![Page 22: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/22.jpg)
Faults
With each piece of clay set on the table in front of you, model a strike-slip fault by pushing one piece of clay forward while pulling the other piece towards you. Draw what you see.
![Page 23: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/23.jpg)
Faults Strike-slip
Fault – opposing forces cause rock to break and move horizontally (like at a transform boundary)
![Page 24: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/24.jpg)
Folds and Faults Folding = bending Fault = breaking
![Page 25: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/25.jpg)
Summary When stress is put on rocks, they can
either bend (fold) or break (fault). Syncline, Anticline and Monocline are three types of folds. Normal, Reverse and Strike-Slip are three types of faults. Each play a role in creating the different types of landforms around us.
![Page 26: Intro](https://reader036.vdocuments.mx/reader036/viewer/2022070422/568165b6550346895dd8b476/html5/thumbnails/26.jpg)
Objective 10/14/2011
Outro
Describe the three major types of folds and faults by modeling them.
The diagram shows a profile of rock layers.Which point indicates the oldest exposed layer?
A B C D