8.1 Mass Movements

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  • 8.1 Mass Movements

    1. 1. Chapter 8.1 Mass Movements at Earth’s Surface Pages 181-190
    2. 2. Goal 1 Identify the 5 factors that affect mass movements
    3. 3. <ul><li>Mass movements </li></ul><ul><ul><li>the down-slope movement of loose sediments and weathered rock resulting from the pull of gravity </li></ul></ul>
    4. 4. <ul><li>Slope angle </li></ul>
    5. 5. <ul><li>Material weight </li></ul>
    6. 6. <ul><li>Material resistance to movement </li></ul>
    7. 7. <ul><li>Trigger </li></ul>
    8. 8. <ul><li>Water </li></ul>
    9. 9. Goal 2 Recognize and describe types of mass movements
    10. 10. <ul><li>Creep </li></ul><ul><ul><li>Slow, few cm/year </li></ul></ul><ul><ul><li>All slopes </li></ul></ul>
    11. 11. <ul><ul><li>Tilted objects </li></ul></ul>
    12. 12. <ul><ul><li>Broken construction </li></ul></ul><ul><ul><li>Overtake roads, sidewalks </li></ul></ul>
    13. 13. <ul><li>Flows </li></ul><ul><ul><li>Thick liquid </li></ul></ul><ul><ul><li>Vibration trigger </li></ul></ul><ul><ul><li>Rain trigger in arid area </li></ul></ul><ul><ul><li>Mixing </li></ul></ul>
    14. 14. <ul><ul><li>Earth flow = slow </li></ul></ul>
    15. 15. <ul><ul><li>Mud flow =Fast </li></ul></ul>
    16. 16. <ul><li>Slides </li></ul><ul><ul><li>Rapid </li></ul></ul><ul><ul><li>Block of material </li></ul></ul><ul><ul><li>Little mixing </li></ul></ul><ul><ul><li>Trigger = earthquake </li></ul></ul>
    17. 18. <ul><ul><li>Rockslide </li></ul></ul>
    18. 19. <ul><ul><li>Rockslide </li></ul></ul>
    19. 20. <ul><ul><li>Landslide </li></ul></ul>
    20. 21. <ul><li>Check out this link to see a video of a landslide in Japan </li></ul><ul><li>http://nwgeoscience.com/kelso/ </li></ul>
    21. 22. <ul><li>Slump </li></ul><ul><li>Type of landslide </li></ul><ul><li>Materials “rotate” </li></ul><ul><li>Curved slide </li></ul>
    22. 26. <ul><li>Avalanche </li></ul><ul><ul><li>Snow </li></ul></ul><ul><ul><li>Slope 35° </li></ul></ul><ul><ul><li>Melt – refreeze </li></ul></ul><ul><ul><li>More snow </li></ul></ul><ul><ul><li>Vibration trigger </li></ul></ul>
    23. 29. <ul><li>Rock Falls </li></ul><ul><ul><li>High elevations </li></ul></ul><ul><ul><li>Road cuts </li></ul></ul><ul><ul><li>Rocky shorelines </li></ul></ul><ul><ul><li>Weathered Rock </li></ul></ul><ul><ul><li>Falls </li></ul></ul>
    24. 32. Picture Credits <ul><li>http://web.umr.edu/~rogersda/landslide_hazards/ </li></ul><ul><li>http://www.mrd.gov.fj/gfiji/img/infonote/creep.gif </li></ul><ul><li>http://epod.usra.edu/archive/images/soilcreepaspens1sm.jpg </li></ul><ul><li>http://www.mtsu.edu/~cdharris/GEOL100/erosion/btown-wall.jpg </li></ul><ul><li>http://pubs.usgs.gov/fs/2004/3072/fs-2004-3072.html </li></ul><ul><li>http://www.kgs.ku.edu/Extension/image/landslide1.html </li></ul><ul><li>http://landslides.usgs.gov/recent/socal_reconn/images/photo5.jpg </li></ul><ul><li>http://www.metrokc.gov/prepare/preparerespond/hazardsdisasters/landslides.aspx </li></ul><ul><li>http://en.wikipedia.org/wiki/Image:Landslide.jpg </li></ul><ul><li>http://www.yosemite.org/newsroom/clips2006/september/Rockslide.jpg </li></ul><ul><li>http://seis.natsci.csulb.edu/bperry/Mass%20Wasting/ShearStressSteepSlopeDiagramB.jpg </li></ul><ul><li>http://landslides.usgs.gov/learning/images/misc/slumpNoDak.jpg </li></ul><ul><li>http://www.uwsp.edu/geo/faculty/ritter/images/lithosphere/mass_wasting_erosion/slump_USGS_DDS21.jpg </li></ul><ul><li>http://epod.usra.edu/archive/images/bitterwater_slump_s.jpg </li></ul><ul><li>http://www.avalanche.org/~lsafc/JPGFILES/NOMEN2.GIF </li></ul><ul><li>http://www-evasion.imag.fr/Membres/Fabrice.Neyret/NaturalScenes/avalanches/catalog.html </li></ul><ul><li>http://www.boingboing.net/images/_us.yimg.com_p_ap_20050110_capt.cadd10101102308.topix_california_storm_cadd101.jpg </li></ul><ul><li>http://www.physci.mc.maricopa.edu/Geology/FieldTrips/ColoradoRiver/2004Summer/ColoradoRiver_2004Summer_Images_640/CR_Leighty_052904_3681_Mile0072_PcPtPk_RockFall.JPG </li></ul><ul><li>Also Wikipedia commons carried some Public Domain Images </li></ul>

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