do now n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Do Now: PowerPoint Presentation
Download Presentation
Do Now:

Loading in 2 Seconds...

play fullscreen
1 / 21

Do Now: - PowerPoint PPT Presentation


  • 166 Views
  • Uploaded on

Do Now: . 1. Where do most earthquakes and volcanoes occur? 2. Please list the three types of plate boundaries— 3. Which type of plate movement (plate boundary) produces mountains? Explain why. Announcements. Quiz tomorrow! Test Friday! Checklist Friday!. Notes 10: Mountain Building .

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Do Now:' - kalei


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
do now
Do Now:

1. Where do most earthquakes and volcanoes occur?

2. Please list the three types of plate boundaries—

3. Which type of plate movement (plate boundary) produces mountains? Explain why.

announcements
Announcements
  • Quiz tomorrow!
  • Test Friday!
  • Checklist Friday!
intro to mountain building
Intro to mountain building
  • Oro = mountain
  • genesis = to build
  • Orogenesis = building mountains!
slide5

Mountains form because of plate tectonics!

  • There are 2 different types of mountain formation
fault block mountains
Fault-block mountains
  • Occur at faults!
  • Fault = fracture in the earth’s crust where movement has happened
    • Example: San Andreas fault in California
fault block mountains1
Fault-block mountains
  • Hanging wall = rock surface above the fault
  • Normal fault= hanging wall moves down. This makes the crust get longer.
    • http://geology1a-1.wikispaces.com/file/view/NormalFault.gif/90969209/NormalFault.gif
fault block mountains2
Fault-block mountains
  • Form along big normal faults!
    • Hanging wall moves down, the crust is pushed up - making a mountain!
    • Example: Teton Range in Wyoming, Sierra Nevada in California
    • http://geology1a-1.wikispaces.com/file/view/NormalFault.gif/90969209/NormalFault.gif
think box
Think Box!
  • What is a fault?
  • What is a normal fault?
  • How do mountains form?
  • What are some examples of fault-block ranges?
folded mountains
Folded mountains
  • Folded mountains occur at convergent boundaries!
  • Most common type of mountain
folded mountains1
Folded mountains
  • Some background:
  • Stress = force acting on a rock. When stress is big enough, deforms rocks (change shape)
folded mountains2
Folded mountains
  • Tensional stress = pushing out (gets bigger)
  • http://earthquake.usgs.gov/learn/glossary/?term=tensional%20stress
folded mountains3
Folded mountains
  • Compressional stress can lead to folding
  • Folds = wavelike ripples (like folding a sheet of paper)
folded mountains4
Folded mountains
  • 3 main types of folds:
    • Anticlines = folding up
    • Synclines = folding down, troughs
    • Monoclines = large steps
folded mountains5
Folded mountains
  • When 2 tectonic plates collide, the compressional stress forces the crust to fold up (anticlines) forming mountains!
  • Examples: Appalachian mountains, Rocky mountains, Alps, Himalayas
video questions
Video Questions
  • Describe the Earth forces that are responsible for mountain building in this part of Alaska.
  • How do we know that the coastal range in Alaska is tectonically active?
  • What do mountain growth, creation of ocean trenches, and volcanoes have in common? Where are these processes taking place on the planet? Is there a pattern?
  • Why do you think that there still are measurable residual movements from the 1964 Earthquake?
exit ticket
Exit Ticket
  • What is compressional stress?
  • What is an anticline?
  • Which type of mountains are the most common?