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Transcript of Rock Cycle
into small pieces or particles Physical Chemical Biological This is due to
Weathering Erosion These particles begin
to move Water Wind Ice Gravity Sedimentary Layers of Sediment Pile Up Particles Stick Together by clay
or minerals Deposition & Compaction Deep in the Earth's Crust Start to change the Rocks Metamorphic Pressure & Temperature The Rocks Begin to Melt Molten Rock is called Magma Magma also comes from material below the Earth's crust - the mantle. This new material rises up from the mantle and adds to the magma produced from the molten crust.
Molten rock can sometimes form huge reservoirs called magma chambers within the Earth's crust. Left undisturbed over many hundreds of thousands of years this magma will cool and crystallize to form intrusive igneous rocks. Sometimes magma can force itself through a crack or fault in the rock at the Earth's surface. It pours out over the Earth's surface in a volcanic eruption, thus extrusive igneous rocks Igneous Rocks cool Sedimentary Rocks are recognized by:
• grains cemented together
• the presence of fossils
• usually light-colored and light weight
• may display interlocking grains Metamorphic Rocks are recognized by:
• the interlocking texture of large grains
• foliation (layering)
• banded light and dark colors
• "ching" sound instead of a "chunk" sound
when tapped Igneous Rocks were recognized by:
• the interlocking texture of the grains
• the presence of vesicules (holes) in extrusive
• may be dark-colored and heavy
may display two grain sizes, one much larger
than the other The Rock Cycle Resources Oxford University Museum of Natural History
Mineralogical Society of America
Shale Becomes Slate