IGNEOUS ROCKS Igneous means “made from fire or heat”. Igneous rock is formed when magma from deep inside the Earth forces its way out and reaches the Earth‟s surface. Magma- molten or liquefied rock
TWO KINDS OF IGNEOUS ROCKS EXTRUSIVE IGNEOUS This forms when magma comes to the surface and cools quickly. The slower the rocks cool down, the larger the crystals that are formed.
TWO KINDS OF IGNEOUS ROCKS INTRUSIVE IGNEOUS Itis formed when magma hardens or cools slowly inside Earth. Slowly cooling magma forms coarse-grained rocks.
EXAMPLES OF IGNEOUS ROCKS Granite Basalt Pumice Obsidian Peridotite Gabbro TYPES OF ROCKS
SEDIMENTARY ROCKS Made from pieces of rocks and minerals called sediments which form in layers The particles were buried, compressed and cemented to a solid mass. Lithification- the process that turns the loose sediments in the bottom of the sea or river bed into hard sedimentary rocks
EXAMPLES OF SEDIMENTARY ROCKS Shale Limestone Sandstone Coal Breccia Flint TYPES OF ROCKS
METAMORPHIC ROCKS Metamorphic means „change in form‟ Either sedimentary or igneous rocks that become different in color, hardness and in other ways because of their exposure to heat and pressure
EXAMPLES OF METAMORPHIC ROCKS Marble Slate Schist Gneiss Quartzite