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ROCK TYPES & NAMES PowerPoint Presentation
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ROCK TYPES & NAMES

ROCK TYPES & NAMES

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ROCK TYPES & NAMES

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  1. Igneous Metamorphic Sedimentary ROCKTYPES & NAMES

  2. Igneous Rocks Igneous rock is formed by magma (molten rock) cooling and becoming solid. Extrusive Intrusive

  3. Metamorphic Metamorphic rock is the result of the transformation of any existing rock type, the protolith, in a process called metamorphism which means "change in form". The protolith is subjected to heat and pressure causing profound physical and/or chemical change. Foliated Non Foliated

  4. Sedimentary Sedimentary rock is a type of rock that is formed by sedimentation of material at the Earth's surface and within bodies of water. Sedimentation is the collective name for processes that cause mineral and/or organic particles to settle and accumulate or minerals to precipitate from a solution. Physically weathered Chemically weathered

  5. Igneous EXTRUSIVE • Igneous rocks are also formed when volcanoes erupt, causing the magma to rise above the earth's surface. When magma appears above the earth, it is called lava. Igneous rocks are formed as the lava cools above ground, Through PYROCLASTIC (explosive) activity or FLOW. • Note: typically pyroclastics occur in felsic volcanism, Flow occurs in mafic volcanoes. scoria Pumice Obsidian Welded Tuff Basalt

  6. Igneous INTRUSIVE • Underground, they are formed when the melted rock, called magma, deep within the earth becomes trapped in small pockets. As these pockets of magma cool slowly underground, the magma becomes igneous rocks. • Note: rough crystalline texture! Gabbro (Mafic-Dark) GRANITE (Felsic- light) Dirotie- felsic/mafic

  7. Sedimentary “1” ChrysocollaBreccia coal Navajo Sandstone

  8. Sedimentary “2” • Chemical deposits and Evaporites Limestone Rock salt

  9. Metamorphic FOLIATED Phyllite Marble Thin section Schist

  10. Metamorphic NONFOLIATED Anthracite coal Thin section Quartzite