I. Formation They are formed when hot, liquid rock, or magma, cools and solidifies (Hardens)
UNDER CERTAIN CONDITIONS, HOT ROCKS OF THE UPPER MANTLE AND LOWER CRUST MELT FORMING A MOLTEN LIQUID...
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Transcript of UNDER CERTAIN CONDITIONS, HOT ROCKS OF THE UPPER MANTLE AND LOWER CRUST MELT FORMING A MOLTEN LIQUID...
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UNDER CERTAIN CONDITIONS, HOT ROCKS OF THE UPPER MANTLE AND LOWER CRUST MELT FORMING A MOLTEN LIQUID CALLED MAGMA. IGNEOUS ROCKS FORM WHEN MAGMA SOLIDIFIES.
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* SIZE, SHAPE AND ARRANGEMENT OF MINERAL GRAINS , OR CRYSTALS.
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1.) VOLCANIC
2.) PLUTONIC
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*THESE TYPE OF ROCKS FORM AS A RESULT OF MAGMA SPEWING OUT ON TO THE EARTHS SURFACE. THE LAVA THEN COOLS AND SOLIDIFIES.* THESE ROCKS ARE FAST COOLING AND AS A RESULT HAVE SMALL OR NO CRYSTALS
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* “GLASS” COOLED FAST UNDER WATER. THERE ARE NO CRYSTALS!!
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* GASSES BLAST FROM A VOLCANO AND SOLIDIFY, BUT LEAVE MANY AIR BUBBLES IN THE ROCK.
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* THIS TYPE OF ROCK IS FORMED WHEN MAGMA SOLIDIFIES WITHIN THE EARTH’S CRUST. * THE OVERLYING ROCK INSULATES THE MAGMA LIKE A THICK BLANKET.
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* MAGMA CRYSTALIZES VERY SSSLLLOOOWWWLLLYYY!!
* CRYSTALS GROW OVER HUNDREDS OF THROUSANDS TO MILLIONS OF YEARS.
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GRANITE IS THE MOST ABUNDANT ROCK IN THE CONT. CRUST
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* WHEN A ROCK IS FELSIC, IT MEANS IT HAS MORE ALUMINUM THAN OTHER STUFF. (Al)* LOWER DENSITIES
EX: GRANITE, RHYOLITE, PUMICE
* HAVE LIGHT COLORS*
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* LOCATED ON THE RIGHT SIDE OF “IGNEOUS ROCK IDEN. CHART. (P.6)
*DARKER IN COLOR* HIGHER DENSITIES
* MORE IRON(Fe) AND MAGNESIUM(Mg)
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PUMICE
BASALTRHYOLITE
GRANITEGABBRO
OBSIDIAN
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* INCREASED HEAT AND PRESSURE UNDERGROUND CREATE THESE ROCKS
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CHARACTARISTICS-DO NOT MELT
-MAY SHOW CRYSTALS IN BANDS-SOMETIMES LOOK LIKE CRYSTALS HAVE MELDED OR SQUISHED TOGETHER
-MAY LOOK DISTORTED
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* THIS USED TO BE SHALE
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*THIS USED TO BE CLAY OR FELDSPAR
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* THIS USED TO BE GRANITE
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*THIS USED TO BE LIMESTONE!!