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Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
Weatheringerosion mass wasting
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Weatheringerosion mass wasting

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  • 1. WEATHERING, SOIL, AND MASS WASTING <br />
  • 2. DIFFERENCIATING EXTERNAL PROCESSES &amp; INTERNAL PROCESSES<br />External process- processes that occur at or near Earth’s surface and powered by the energy from the Sun<br />Internal Process- processes that occur underneath the Earth’s surface and derives its energy from Earth’s interior<br />
  • 3. THREE EARTH’SEXTERNAL PROCESSES<br />Weathering<br />Mass Wasting<br />Erosion<br />
  • 4. WEATHERING<br /><ul><li>the physical breakdown &amp; chemical decomposition of rocks
  • 5. part of the rock cycle
  • 6. considered as a preparation for erosion
  • 7. rocks are damaged physically and/or chemically</li></li></ul><li>
  • 8. AGENTS OF WEATHERING:<br />change of the environment<br />Water<br />air/wind<br />human activities<br />chemical substances<br />
  • 9. KINDS OF WEATHERING<br />Mechanical Weathering<br />Chemical Weathering<br />
  • 10. MECHANICAL WEATHERING<br /><ul><li>rock is broken to smaller pieces without changing its chemical composition
  • 11. increases the amt. of surface available for chemical weathering
  • 12. results in smaller pieces from a single large one</li></li></ul><li>4 PROCESSES OF MECHANICAL WEATHERING<br />Frost Wedging- caused by the freezing and thawing of water that seeps into cracks of rocks<br />Abrasion- caused by the rubbing and/or bouncing of rocks with each other<br />Exfoliation/Unloading- peeling away of large sheets of loosened materials in the rock<br />
  • 13. d. Biological Activities- caused by an organism’s activity such as plants, burrowing animals &amp; humans<br />
  • 14. FROST WEDGING<br />ABRASION<br />EXFOLIATION<br />
  • 15. CHEMICAL WEATHERING<br />- rock is broken down by chemical action resulting in the change of the composition of the rock<br />AGENTS: <br />Oxygen 3. carbon dioxide<br />Rainwater 4. acids produced by decaying organisms<br />
  • 16. 2 PROCESSES OF CHEMICAL WEATHERING<br />Oxidation- mineral is interacted chemically by oxygen<br />Hydration- mineral is interacted chemically by water<br />Carbonation- mineral is interacted chemically by carbon dioxide or carbonic acid<br />
  • 17. BAUXITE- COMBINATION OF OXYGEN, HYDROGEN &amp; ALUMINUM<br />HEMATITE FORMED BY OXIDATION<br />
  • 18. EROSION<br /><ul><li>physical removal of the material
  • 19. transporting of the rock from one place to another</li></ul>AGENTS:<br />Wind<br />Water<br />Ice<br />
  • 20. SHEET AND WIND EROSION<br />Sheet erosion- soil is removed by thin sheets of water<br />Wind erosion- caused by wind and only very significant during windy days or during a drought<br />
  • 21.
  • 22. RILLS AND GULLIES<br />Rills- narrow incision of soil caused by overland flow<br />Gully- landform created by running water which sharply eroded the land, typically on a hillside<br />
  • 23. G<br />U<br />L<br />L<br />Y<br />R<br />I<br />L<br />L<br />S<br />
  • 24. MASS WASTING<br /><ul><li>Movement of rock, regolith &amp; soil under the direct influence of gravity
  • 25. The step that follows weathering</li></li></ul><li>AGENTS OF MASS WASTING:<br />Gravity- main controlling force<br />Trigger- initiates downslope movements<br />Water- heavy rains, snowmelt<br />Over steepened Slopes<br />Removal of Vegetation<br />6. Natural Calamities<br />
  • 26. MOTION TYPES OF MASS WASTING<br />1. fall- slopes which are too steep (ex. Rockfall)<br />2. Slides- materials remain fairly &amp; coherent &amp; moves along a well defined surface (ex. Landslide)<br />3. Flow- moves downslope as a vicious FLUID (ex. Mudflow)<br />4. Slump- downward sliding of a mass<br />
  • 27. A<br />V<br />A<br />L<br />A<br />N<br />C<br />H<br />E<br />R O C K F A L L<br />L<br />A<br />N<br />D<br />S<br />L<br />I<br />D<br />E<br />
  • 28. THE END <br />
  • 29. BIBLOIGRAPHY:<br />Tarbuck, Edward and Lutgens, Frederick. Earth Science: Basic Principles and Concepts, Pearson Education South Asia Pte Ltd. 23-25 First Lok Yang Road, Jurong Singapore<br />http://www.regentsprep.org<br />http://www.google.com<br />http://images.google.com.ph/imghp?hl=en&amp;tab=wi<br />
  • 30. THANKS FOR WATCHING! <br />By: Russel Christine Corcino<br />MSU-IIT IDS<br />

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