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Metamorphic Rocks  2011acloutier copyright
Metamorphic Rocks  2011acloutier copyright
Metamorphic Rocks  2011acloutier copyright
Metamorphic Rocks  2011acloutier copyright
Metamorphic Rocks  2011acloutier copyright
Metamorphic Rocks  2011acloutier copyright
Metamorphic Rocks  2011acloutier copyright
Metamorphic Rocks  2011acloutier copyright
Metamorphic Rocks  2011acloutier copyright
Metamorphic Rocks  2011acloutier copyright
Metamorphic Rocks  2011acloutier copyright
Metamorphic Rocks  2011acloutier copyright
Metamorphic Rocks  2011acloutier copyright
Metamorphic Rocks  2011acloutier copyright
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Metamorphic Rocks 2011acloutier copyright

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Earth & Space Science …

Earth & Space Science
Geology Unit
Annie Cloutier
2011

Published in: Education
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  • 1. Metamorphic Rocks by Annie Cloutier copyright 2011
  • 2. <ul><li>Pressure and heat increase with depth </li></ul><ul><li>Pressure and heat inside the Earth cause the changes to occur in rock </li></ul><ul><li>Where does the heat come from ? </li></ul><ul><li>Earth generates heat from the radioactive core </li></ul><ul><li>working its way up to the lithosphere </li></ul>Metamorphic Greek word origin meta means “change” morph means “form”
  • 3. Two Types of Metamorphic Groups <ul><li>Regional metamorphism &gt; when high temperatures and pressure affect large regions of Earth’s crust belts of metamorphic rock happen </li></ul><ul><li>Contact metamorphism &gt; when molten rock comes in contact with solid rock, large scale minerals change with little deformation </li></ul>
  • 4. Regional Metamorphism
  • 5. Contact metamorphism
  • 6. Cause &amp; Effect of Metamorphism
  • 7. Hydrothermal Metamorphism when very hot water reacts with rock and alters its chemistry and mineralogy
  • 8. Getting into hot water can be good <ul><li>hydrothermal fluids invade the surrounding rocks and change their mineralogy, textures and chemistry </li></ul><ul><li>valuable ore deposits of gold , copper, silver, tungsten and lead are formed this way </li></ul>
  • 9. Two Textures of Metamorphic Rocks <ul><li>foliated </li></ul><ul><li>wavy lines, bands, layers characterize foliated rocks; </li></ul><ul><li>often have small crystals of mineral grains, and long axis of parallel alignment </li></ul><ul><li>Schist </li></ul><ul><li>Gneiss </li></ul><ul><li>Shale </li></ul><ul><li>nonfoliated </li></ul><ul><li>usually form with blocky crystal shapes; sometimes record faint color ripple marks </li></ul><ul><li>Quartzite </li></ul><ul><li>Marble </li></ul><ul><li>Calcite </li></ul>
  • 10. Gneiss &gt; <ul><li>Schist &gt; </li></ul>&lt; Slate &gt;
  • 11. It’s Morphing time.. <ul><li>Metamorphic Rock </li></ul><ul><li>Gneiss &lt; </li></ul><ul><li>Marble &lt; </li></ul><ul><li>Slate &lt; </li></ul><ul><li>Mica schist &lt; </li></ul><ul><li>Parent Rock </li></ul><ul><li>Granite </li></ul><ul><li>Limestone </li></ul><ul><li>Shale </li></ul><ul><li>Mica pegmatite </li></ul>Its Morphin’ time !
  • 12. The Rock Cycle
  • 13. The end is not…it’s all a cycle
  • 14. <ul><li>… but this is the end of the power point </li></ul>

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