after 7.5 mins, 1 st p wave arrived at new york. eas 220 lab 4: igneous rocks
TRANSCRIPT
After 7.5 mins, 1st 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
•Phaneritic
•Porphyritic
•Vesicular
•Glassy
Aphanitic
Phaneritic
Porphyritic
Vesicular
Glassy
Bowen’s Reaction Series
Classification Scheme
Intrusive Rocks and Extrusive Equivalents
Petrographic Microscopes: Minerals in thin section
Minerals
•Quartz
•Feldspars
•Micas
•Pyroxene
•Olivine
•Hornblende
Biotite
Quartz
MuscoviteOlivine
Quartz
Feldspar
Muscovite/Biotite
Pyroxenes
Olivine
Hornblende (Amphibole)