After 7.5 mins, 1 st P wave arrived at New York. EAS 220 Lab 4: Igneous Rocks.

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Presentation transcript:

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 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 Muscovite Olivine

Quartz

Feldspar

Muscovite/Biotite

Pyroxenes

Olivine

Hornblende (Amphibole)

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