ROCK CLASSIFICATION

 
IGNEOUS
 Rocks that have solidified from a molten state.  There are two types of Igneous rocks:
Plutonic - Rock from magma rising up from deep under the earth's crust, and solidifies as it cools before it reaches the earth's surface.
Volcanic - Rock that was originally lava, hot magma that reached the surface of the earth before it hardened.		 examples of:
plutonic igneous rocks - Granite, Peridotite
volcanic igneous rocks - Obsidian, Basalt, Rhyolite
SEDIMENTARY
 Rock formed by the accumulation of particles on or near the earth's surface, and compacted down, often under extreme pressure, creating rock layers. examples of sedimentary rock:
Limestone, Shale, Sandstone, Dolomite, Gypsum, Quartzite, and stones containing fossils
METAMORPHIC
 rocks resulting from changes within preexisting rocks, by extreme pressure, temperature, and chemical activity. examples of metamorphic rock:
Kyanite, Mica, Garnet, Calcite, Quartz, Pyrite, Marble, Gneiss, Schist


VOLCANO ROCKS!
#KD-3 Collection of 5 different volcanic rocks, from the U.S. Very cool! $5

ROCK CLASSIFICATION SET
#KD-4 Includes 8 samples of igneous, sedimentary, and metamorphic rocks, and rock classification chart. $12

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