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Glaciers

Published on Nov 23, 2015

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PRESENTATION OUTLINE

1.

GLACIERS

Photo by brewbooks
2.

GLACIERS ARE A CAUSE OF EROSION (WEARING DOWN)

AND DEPOSITION (BUILDING UP) ON EARTH'S SURFACE
Photo by subarcticmike
3.

GLACIER

ANY LARGE MASS OF ICE MOVING SLOWLY OVER LAND
Photo by Aztlek
4.

THERE ARE 2 TYPES OF GLACIERS

  • Valley (smaller)
  • Continental (bigger)
Photo by Piero...
5.

VALLEY GLACIERS

LONG, NARROW, FORMED IN A MTN VALLEY WHEN SNOW BUILDS UP
Photo by Phil @ Delfryn Design
6.

CONTINENTAL GLACIERS

HUGE, COVER MOST OF A CONTINENT OR LAND MASS (ANTARCTICA)
Photo by hans905
7.

GLACIERS FORM WHERE MORE SNOW FALLS THAN MELTS

Photo by Zach Dischner
8.

PRESSURE AND WEIGHT OF THE SNOW COMPACTS THE BOTTOM INTO ICE

Photo by tiswango
9.

GRAVITY PULLS GLACIERS DOWNHILL

THAT IS WHEN GLACIAL EROSION HAPPENS
Photo by portmanfamilia
10.

The movement of a glacier changes the land beneath it slowly over time through
2 processes:
PLUCKING AND ABRASION

11.

PLUCKING

ROCK FROZEN IN GLACIER GETS PICKED UP AND MOVES WITH GLACIER
Photo by thor_mark 
12.

ABRASION

ROCKS CARRIED BY GLACIER SCRAPE THE LAND UNDERNEATH
Photo by Instituto de Geociencias (CSIC-UCM)
13.

GLACIAL DEPOSITION HAPPENS NEXT

MELTING GLACIERS DROP THE CARRIED SEDIMENT AND CREATE NEW LANDFORMS
Photo by j3tdillo
14.

TILL

MIXTURE OF CLAY, SILT, & GRAVEL DEPOSITED DIRECTLY ON THE SURFACE
Photo by subarcticmike
15.

MORAINE

TILL DEPOSITED AT THE EDGE OF GLACIER FORMING A RIDGE OR MORAINE
Photo by NASA ICE
16.

KETTLES

SMALL HOLES FORMED WHEN A CHUNK OF ICE MELTS
Photo by VSmithUK
17.

DID YOU KNOW THAT THE GREAT LAKES WERE FORMED BY GLACIERS?

Photo by NOAA Great Lakes Environmental Research Laboratory

Lynda Whyte