1. Glaciers

2. What is a glacier?  Glacier- A large moving mass of snow and ice

3. Where are glaciers found?

4. How are glaciers formed?  Snow falls on the side of a mountain and begins to collect

5.  As more and more snow piles up, it creates pressure  The snow is packed down into ice and accumulates as a large sheet of ice  As more and more snow piles up, it creates pressure  The snow is packed down into ice and accumulates as a large sheet of ice

6. Snow into Ice  Snow becomes packed  As its packed, it turns to ice

7. Pressure and Gravity  As more snow falls, glaciers become thicker and heavier  Gravity pulls glaciers downward with great pressure against the ground

8. Movement  Glaciers move very slowly  Glaciers slide, or creep over the ground

9. Calving Calving occurs when pieces of a tidewater glacier break off and fall into the sea

10. Calving

11. Crevasses  As Glaciers move, the ice on top bends and cracks  These cracks are called Crevasses

12. Crevasses

14. Glacier Snout  Front end of a glacier. Also called the terminus.

16. Erosion  As Glaciers move, they pick up debris  Stones and boulders are picked up and carried along  Using these stones and their weight, glaciers grind and carve the landscape

17. Erosion

19.  A glaciated valley in the Mount Baker- Snoqualmie National Forest showing the characteristic U-shape and flat bottom.

20. Erosion  The Llanberis Pass in Snowdonia National Park, north Wales, is typical of a U-shaped valley formed by glacial erosion.

21. Icebergs

22. Most of the icebergs are found under water, making them very dangerous to ships.

24. Calving of a Glacier

25. Melting Glaciers

26. Glacier Fun  When glaciers melt they deposit materials, creating terminal moraines  Let’s see if we can use a model to show what this looks like.  Read C10 on Terminal Moraines  When glaciers melt they deposit materials, creating terminal moraines  Let’s see if we can use a model to show what this looks like.  Read C10 on Terminal Moraines

27. Terminal Moraines A massive terminal moraine marks the greatest advance of a glacier, during the last centuries, in Cordillera Huyhuash, Peru. A lake has formed between the terminal moraine and the glacier front. The tall peak is Nevado Yerupaja. Photo J. Alean 1979.

28. Picture References  http://www.instablogsimages.com/images/2007/09/26/glacier_6914.jpg http://www.instablogsimages.com/images/2007/09/26/glacier_6914.jpg  http://omega.utu.fi/images/hintereisferner_aerialview.jpg http://omega.utu.fi/images/hintereisferner_aerialview.jpg  http://www.uwsp.edu/geo/faculty/ritter/images/lithosphere/glacial/glacier_zones.jpg http://www.uwsp.edu/geo/faculty/ritter/images/lithosphere/glacial/glacier_zones.jpg  http://www.thegreenhead.com/imgs/sno-baller-snow-ball-maker-7.jpg http://www.thegreenhead.com/imgs/sno-baller-snow-ball-maker-7.jpg  http://www.rosssea.info/pix/big/Commonwealth-Glacier-Stream.jpg http://www.rosssea.info/pix/big/Commonwealth-Glacier-Stream.jpg  http://en.wikipedia.org/wiki/Image:Grosser_Aletschgletscher_3178.JPG http://en.wikipedia.org/wiki/Image:Grosser_Aletschgletscher_3178.JPG  http://www.scienceclarified.com/images/uesc_05_img0282.jpg http://www.scienceclarified.com/images/uesc_05_img0282.jpg  http://images.google.com/imgres?imgurl=http://www.dkimages.com/discover/previews/79 3/10042113.JPG&imgrefurl=http://www.dkimages.com/discover/DKIMAGES/Discover/Home /Science/Earth-Sciences/Geology/Landform-Evolution/Glaciers-and-Ice- Sheets/Features/Features-6.html&usg=__0OxwO-5rZGMLp8b- t8R7NM2pfwg=&h=909&w=1136&sz=362&hl=en&start=1&sig2=uw2VFJeSEzViDxRebtnd3 A&um=1&tbnid=PdZUweB8OcexvM:&tbnh=120&tbnw=150&ei=JU8nSdDdBY628AS1jN3_Ag &prev=/images%3Fq%3Ddiagram%2Bof%2Ba%2Bglacier%26um%3D1%26hl%3Den%26r lz%3D1T4DKUS_enUS252US253%26sa%3DN http://images.google.com/imgres?imgurl=http://www.dkimages.com/discover/previews/79 3/10042113.JPG&imgrefurl=http://www.dkimages.com/discover/DKIMAGES/Discover/Home /Science/Earth-Sciences/Geology/Landform-Evolution/Glaciers-and-Ice- Sheets/Features/Features-6.html&usg=__0OxwO-5rZGMLp8b- t8R7NM2pfwg=&h=909&w=1136&sz=362&hl=en&start=1&sig2=uw2VFJeSEzViDxRebtnd3 A&um=1&tbnid=PdZUweB8OcexvM:&tbnh=120&tbnw=150&ei=JU8nSdDdBY628AS1jN3_Ag &prev=/images%3Fq%3Ddiagram%2Bof%2Ba%2Bglacier%26um%3D1%26hl%3Den%26r lz%3D1T4DKUS_enUS252US253%26sa%3DN  http://images.encarta.msn.com/xrefmedia/sharemed/targets/images/pho/t628/T628797A.jp g http://images.encarta.msn.com/xrefmedia/sharemed/targets/images/pho/t628/T628797A.jp g  http://www.instablogsimages.com/images/2007/09/26/glacier_6914.jpg http://www.instablogsimages.com/images/2007/09/26/glacier_6914.jpg  http://omega.utu.fi/images/hintereisferner_aerialview.jpg http://omega.utu.fi/images/hintereisferner_aerialview.jpg  http://www.uwsp.edu/geo/faculty/ritter/images/lithosphere/glacial/glacier_zones.jpg http://www.uwsp.edu/geo/faculty/ritter/images/lithosphere/glacial/glacier_zones.jpg  http://www.thegreenhead.com/imgs/sno-baller-snow-ball-maker-7.jpg http://www.thegreenhead.com/imgs/sno-baller-snow-ball-maker-7.jpg  http://www.rosssea.info/pix/big/Commonwealth-Glacier-Stream.jpg http://www.rosssea.info/pix/big/Commonwealth-Glacier-Stream.jpg  http://en.wikipedia.org/wiki/Image:Grosser_Aletschgletscher_3178.JPG http://en.wikipedia.org/wiki/Image:Grosser_Aletschgletscher_3178.JPG  http://www.scienceclarified.com/images/uesc_05_img0282.jpg http://www.scienceclarified.com/images/uesc_05_img0282.jpg  http://images.google.com/imgres?imgurl=http://www.dkimages.com/discover/previews/79 3/10042113.JPG&imgrefurl=http://www.dkimages.com/discover/DKIMAGES/Discover/Home /Science/Earth-Sciences/Geology/Landform-Evolution/Glaciers-and-Ice- Sheets/Features/Features-6.html&usg=__0OxwO-5rZGMLp8b- t8R7NM2pfwg=&h=909&w=1136&sz=362&hl=en&start=1&sig2=uw2VFJeSEzViDxRebtnd3 A&um=1&tbnid=PdZUweB8OcexvM:&tbnh=120&tbnw=150&ei=JU8nSdDdBY628AS1jN3_Ag &prev=/images%3Fq%3Ddiagram%2Bof%2Ba%2Bglacier%26um%3D1%26hl%3Den%26r lz%3D1T4DKUS_enUS252US253%26sa%3DN http://images.google.com/imgres?imgurl=http://www.dkimages.com/discover/previews/79 3/10042113.JPG&imgrefurl=http://www.dkimages.com/discover/DKIMAGES/Discover/Home /Science/Earth-Sciences/Geology/Landform-Evolution/Glaciers-and-Ice- Sheets/Features/Features-6.html&usg=__0OxwO-5rZGMLp8b- t8R7NM2pfwg=&h=909&w=1136&sz=362&hl=en&start=1&sig2=uw2VFJeSEzViDxRebtnd3 A&um=1&tbnid=PdZUweB8OcexvM:&tbnh=120&tbnw=150&ei=JU8nSdDdBY628AS1jN3_Ag &prev=/images%3Fq%3Ddiagram%2Bof%2Ba%2Bglacier%26um%3D1%26hl%3Den%26r lz%3D1T4DKUS_enUS252US253%26sa%3DN  http://images.encarta.msn.com/xrefmedia/sharemed/targets/images/pho/t628/T628797A.jp g http://images.encarta.msn.com/xrefmedia/sharemed/targets/images/pho/t628/T628797A.jp g

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