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After 7.5 mins, 1 st P wave arrived at New York

After 7.5 mins, 1 st P wave arrived at New York. EAS 220 Lab 4: Igneous Rocks. Today’s Lab. 3 Parts: Introduction How igneous rocks form textures Bowen’s Reaction series Igneous Rock Identification Hand samples Thin sections. Formation of Igneous Rocks. Textures. Aphanitic

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After 7.5 mins, 1 st P wave arrived at New York

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  1. After 7.5 mins, 1st P wave arrived at New York

  2. EAS 220 Lab 4: Igneous Rocks

  3. Today’s Lab • 3 Parts: • Introduction • How igneous rocks form • textures • Bowen’s Reaction series • Igneous Rock Identification • Hand samples • Thin sections

  4. Formation of Igneous Rocks

  5. Textures • Aphanitic • Phaneritic • Porphyritic • Vesicular • Glassy

  6. Aphanitic

  7. Phaneritic

  8. Porphyritic

  9. Vesicular

  10. Glassy

  11. Bowen’s Reaction Series

  12. Classification Scheme

  13. Intrusive Rocks and Extrusive Equivalents

  14. Petrographic Microscopes: Minerals in thin section

  15. Minerals Quartz Biotite • Quartz • Feldspars • Micas • Pyroxene • Olivine • Hornblende Muscovite Olivine

  16. Quartz

  17. Feldspar

  18. Muscovite/Biotite

  19. Pyroxenes

  20. Olivine

  21. Hornblende (Amphibole)

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