1. After 7.5 mins, 1 st 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 Feldspars Micas Pyroxene Olivine Hornblende Biotite Quartz Muscovite Olivine

16. Quartz

17. Feldspar

18. Muscovite/Biotite

19. Pyroxenes

20. Olivine

21. Hornblende (Amphibole)