rocks

shagun bansal
Mind Map by shagun bansal, updated more than 1 year ago
shagun bansal
Created by shagun bansal about 5 years ago
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Description

About the varioous rocks and its uses

Resource summary

rocks
  1. igneous rocks
    1. 1) formed from fire 2) magma which erupts as lava cools down to form igneous rocks 3)some magma cools below the surface fo form igneous rocks
      1. examples-basalt and granite
        1. vertical lines of weaknesses
        2. sedimentary rocks
          1. second hand rocks
            1. weight of sediments above compresses those below to form sedimentary rocks

              Annotations:

              • sediments are pieces of rocks broken off from rocks which outcropped on the earths surface millions of years ago
              1. examples-sandstone limeston
              2. horizontal lines of weaknesses
              3. metamorphic rocks
                1. old igneous and sedimentary rocks
                  1. rocks are changed due to heat and pressure
                    1. slate- from clay marble from limestone
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