'Rock' our World!
by Mrs. S
Igneous Rocks
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mostly found in Earth's crust
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volcanic and made from molten material
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examples are lava and granite
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seafloor is made from basalt, a dark lava
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some granite rocks can be millions of years old
Lava, an example of igneous rock
Sedimentary Rocks
- formed from the eroded fragments of other rocks
- also formed from remains of plants and animals
- fragments rest in low lying areas and are pressed into sedimentary rocks
- some examples are sandstone and limestone
- can often find fossils in sedimentary rock
Metamorphic Rocks
- made from igneous or sedimentary rocks
- created by pressure, heat, or the intrusion of fluids
- examples include marble (from limestone) and quartzite (from sandstone)
Sources:
Click links below
