South American Subduction Zones by Maria Leech https://padlet.com/myles1019/ux50okzcb1ma en-us 2017-03-16 01:29:45 UTC 2023-05-09 03:39:42 UTC hello@padlet.com Relation to surface features myles1019 https://padlet.com/myles1019/ux50okzcb1ma/wish/160409485
  • Nazca Plate (oceanic lithosphere) + South American Plate (continental crust) = Andes Mountains 
  • Atacama (a.k.a. Peru-Chile) Trench
  • Volcanism
    • ]]>     2017-03-16 01:42:25 UTC https://padlet.com/myles1019/ux50okzcb1ma/wish/160409485     In 10 million years... myles1019 https://padlet.com/myles1019/ux50okzcb1ma/wish/160409552
  • Height of the Andes could double in just 2 - 4 Ma (making the average mountain 11,886 meters tall!)
    • Delamination process 
    • http://uk.reuters.com/article/science-mountains-andes-dc-idUKN0531341020080605?pageNumber=2&virtualBrandChannel=0 

    • Megathrust quakes (+8.5) due to "locked" plates could be extremely disastrous to human infrastructure  
    http://www.livescience.com/13941-megathrust-earthquakes-chile-japan-subduction-zones.html
    ]]>     2017-03-16 01:42:52 UTC https://padlet.com/myles1019/ux50okzcb1ma/wish/160409552     myles1019 https://padlet.com/myles1019/ux50okzcb1ma/wish/160409863 2017-03-16 01:45:42 UTC https://padlet.com/myles1019/ux50okzcb1ma/wish/160409863 Surface Features joe_j_whitmore https://padlet.com/myles1019/ux50okzcb1ma/wish/160410763 subduction zone is the cause for the mountainous topography on the western side of the continent . Lack of tectonic movement is represented by the plateau on the eastern side. The subducting slab has also caused volcanoes to be present on the western side of the continent, these are part of the Pacific Ring of Fire.]]> 2017-03-16 01:53:17 UTC https://padlet.com/myles1019/ux50okzcb1ma/wish/160410763 myles1019 https://padlet.com/myles1019/ux50okzcb1ma/wish/160411407 2017-03-16 02:00:06 UTC https://padlet.com/myles1019/ux50okzcb1ma/wish/160411407 Dip of Slab ~33 degrees jackstickings https://padlet.com/myles1019/ux50okzcb1ma/wish/160411911 2017-03-16 02:05:06 UTC https://padlet.com/myles1019/ux50okzcb1ma/wish/160411911 Dip of slab maxjfromnz https://padlet.com/myles1019/ux50okzcb1ma/wish/160412335 37 degrees at the Northern End
    33 degrees in Southern End


    ]]>     2017-03-16 02:09:11 UTC https://padlet.com/myles1019/ux50okzcb1ma/wish/160412335     michaellees27 https://padlet.com/myles1019/ux50okzcb1ma/wish/160412575 2017-03-16 02:12:13 UTC https://padlet.com/myles1019/ux50okzcb1ma/wish/160412575 3.7cm movement east yearly on the nazca plate jackstickings https://padlet.com/myles1019/ux50okzcb1ma/wish/160414104 2017-03-16 02:28:52 UTC https://padlet.com/myles1019/ux50okzcb1ma/wish/160414104 Depth Data myles1019 https://padlet.com/myles1019/ux50okzcb1ma/wish/160414742
  • Shallow, less powerful quakes along the coast at the plate boundaries 
  • Deeper, stronger quakes farther inland
  • Some very deep quakes (+600 km) are an effect of  internal deformation of the subducting Nazca plate
  • https://pubs.usgs.gov/of/2010/1083/e/
    • ]]>     2017-03-16 02:39:37 UTC https://padlet.com/myles1019/ux50okzcb1ma/wish/160414742     Fault characteristic joe_j_whitmore https://padlet.com/myles1019/ux50okzcb1ma/wish/160414900 Friction from the subducting oceanic plate creates fracture and deformation. This is the reason for the small frequent earthquakes that occur along the fault 


    ]]>     2017-03-16 02:42:01 UTC https://padlet.com/myles1019/ux50okzcb1ma/wish/160414900     Volcanism in the Andes myles1019 https://padlet.com/myles1019/ux50okzcb1ma/wish/160414973 2017-03-16 02:43:08 UTC https://padlet.com/myles1019/ux50okzcb1ma/wish/160414973 joe_j_whitmore https://padlet.com/myles1019/ux50okzcb1ma/wish/160415092 2017-03-16 02:44:23 UTC https://padlet.com/myles1019/ux50okzcb1ma/wish/160415092 Andes myles1019 https://padlet.com/myles1019/ux50okzcb1ma/wish/160415522 "The convergence of the Nazca and South American Plates has deformed and pushed up limestone strata to form towering peaks of the Andes, as seen here in the Pachapaqui mining area in Peru"

    ]]>     2017-03-16 02:49:41 UTC https://padlet.com/myles1019/ux50okzcb1ma/wish/160415522     Topography Cross Section myles1019 https://padlet.com/myles1019/ux50okzcb1ma/wish/160415805 Topography and depth down to the Moho over a North-Soutprofile . The vertical (E-W lines) define the highly seismically attenuated region.

    http://www.geo.arizona.edu/geo5xx/geo527/Andes/geology.html]]>     2017-03-16 02:53:28 UTC https://padlet.com/myles1019/ux50okzcb1ma/wish/160415805     Timeline myles1019 https://padlet.com/myles1019/ux50okzcb1ma/wish/160415993
  • Start: Paleozoic
  • "The present day mountain belt was developed mainly during the Mesozoic to Recent"
    • Opening of the Atlantic MOR
    • Easterly direction of the slab's dip
    • http://www.geo.arizona.edu/geo5xx/geo527/Andes/intro.html
    ]]>     2017-03-16 02:55:49 UTC https://padlet.com/myles1019/ux50okzcb1ma/wish/160415993     Cross Section jackstickings https://padlet.com/myles1019/ux50okzcb1ma/wish/160416207 2017-03-16 02:58:32 UTC https://padlet.com/myles1019/ux50okzcb1ma/wish/160416207 joe_j_whitmore https://padlet.com/myles1019/ux50okzcb1ma/wish/160416429 2017-03-16 02:59:57 UTC https://padlet.com/myles1019/ux50okzcb1ma/wish/160416429