Chapter 17
This presentation is the property of its rightful owner.
Sponsored Links
1 / 18

Chapter 17 PowerPoint PPT Presentation


  • 180 Views
  • Uploaded on
  • Presentation posted in: General

Chapter 17. Glaciers. 1. Glacier. A large mass of moving ice. 2. Alpine Glacier . a narrow, wedge-shaped mass of ice that forms in a mountainous region and that is confined to a small area by surrounding topography ; examples include valley glaciers, cirque glaciers,

Download Presentation

Chapter 17

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


Chapter 17

Chapter 17

Glaciers


1 glacier

1. Glacier

A large mass of moving ice.


2 alpine glacier

2. Alpine Glacier

  • a narrow, wedge-shaped mass of

  • ice that forms in a mountainous

  • region and that is confined to a

  • small area by surrounding

  • topography; examples include

  • valley glaciers, cirque glaciers,

  • and piedmont glaciers.


3 continental glaciers

3. Continental Glaciers

  • massive sheet of ice that may

  • cover millions of square

  • kilometers, that may be

  • thousands of meters thick, and

  • that is not confined by

  • surrounding topography.


4 basal slip

4. Basal Slip

process that causes the ice at

the base of a glacier to melt

and the glacier to slide.


5 internal plastic flow

5. Internal Plastic Flow

  • the process by which glaciers

  • flow slowly as grains of ice

  • deform under pressure and

  • slide over each other.


6 crevasse

6. Crevasse

in a glacier, a large crack or

fissure that results from ice

movement.


7 cirque

7. Cirque

  • a deep and steep bowl-like

  • depression produced by

  • glacial erosion.


8 arete

8. Arete

a sharp, jagged ridge that

forms between cirques.


9 horn

9. Horn

a sharp, pyramid-like peak

that forms because of the

erosion of cirques.


10 erratic

10. Erratic

  • a large rock transported

  • from a distant source by a

  • glacier.


11 glacial drift

11. Glacial Drift

rock material carried and

deposited by glaciers.


12 till

12. Till

unsorted rock material that

is deposited directly by a

melting glacier.


13 moraine

13. Moraine

a landform that is made from

unsorted sediments deposited

by a glacier.


14 kettle

14. Kettle

  • a bowl-like depression in a

  • glacial drift deposit.


15 esker

15. Esker

  • a long, winding ridge of gravel

  • and coarse sand deposited by

  • glacial melt water streams.


16 ice age

16. Ice Age

a long period of climatic

cooling during which the

continents are glaciated

repeatedly.


17 milankovitch theory

17. Milankovitch Theory

  • the theory that cyclical

  • changes in Earth’s orbit and

  • in the tilt of earth’s axis occur

  • over thousands of years and

  • cause climatic changes.


  • Login