Earthquakes and fold mountains

Description

GCSE Geography (Physical) Mind Map on Earthquakes and fold mountains, created by jeacur on 20/05/2013.
jeacur
Mind Map by jeacur, updated more than 1 year ago
jeacur
Created by jeacur over 11 years ago
101
1

Resource summary

Earthquakes and fold mountains
  1. Earthquakes
    1. A sudden and brief period of intense ground shaking
      1. Focus
        1. The point in the earth's crust where the earthquake originates
        2. Epicentre
          1. The point at the earth's surface directly above the focus (this is also where the shock waves are strongest and where most damage occurs)
          2. Shockwave
            1. Seismic waves generated by the earthquake that pass through the earth's crust
            2. Measuring
              1. Richter scale
                1. A seismograph measure shock waves on Richter scale
                  1. Each point is 10 times stronger than one below
                    1. No upper limit
                      1. Adv. is quantatative not qualatative
                  2. Mercalli scale
                    1. A way of measuring by description
                      1. 1 - barely felt, 5 = felt by almost everyone, sleeping people awoken and windows break
                2. Fold mountains
                  1. Form at destructive plate margins
                    1. Where 2 continental plates collide at destructive plate margin e.g. Himalayas
                      1. There is a geosyncline at the fault of the 2 plates
                        1. Sediment is compressed in layers by overlying sediments in this to form rock
                          1. Continued compression from both plates cause the rocks to fold into mountains
                            1. These fold can be simply made up of synclines and antisyclines or if there is more pressure from one plate than the other, overfolds can occur
                      2. Where an oceanic and continental plate collide at destructive subduction margin e.g. Andes
                        1. As one plate subducts under the other, it pulls the plate down with it, creating an extra deep area of the ocean, which is the trench
                          1. As well, as the plate subducts underneath it causes the plate to crumple/fold up into fold mountains
                    Show full summary Hide full summary

                    Similar

                    Geography Quiz
                    PatrickNoonan
                    Geography Coastal Zones Flashcards
                    Zakiya Tabassum
                    Using GoConqr to study geography
                    Sarah Egan
                    All the Countries of the World and their Capital Cities
                    PatrickNoonan
                    Tectonic Hazards flashcards
                    katiehumphrey
                    Volcanoes
                    1jdjdjd1
                    River Processes and Landforms
                    1jdjdjd1
                    GCSE Geography - Causes of Climate Change
                    Beth Coiley
                    The Rock Cycle
                    eimearkelly3
                    Plate Tectonics
                    eimearkelly3
                    Characteristics and Climate of a hot desert
                    Adam Collinge