Lab Exam 2

Diorite

Gabbro

Andesite

Scoria

Llanite

Obsidian

Granite

Pumice

Rhyolite

Rhyolitic Tuff

Andesite

Basalt

Basalt Porphyry

Granite Pegmatite

Periodotite

Diorite

Composition: intermediate

Texture: Phaneritic

Cooling Rate: intrusive

Intrusive or Extrusive: intrusive

Gabbro

Composition: mafic

Texture: phaneritic

Cooling Rate: slow

Intrusive or Extrusive: intrusive

Andesite

Composition: intermediate

Texture: porphyritic

Cooling Rate: slow

Intrusive or Extrusive: intrusive

Scoria

Composition: mafic

Texture: vesicular

Cooling Rate: fast

Intrusive or Extrusive: extrusive

Llanite

Composition: felsic

Texture: porphyritic

Cooling Rate: non-uniform

Intrusive or Extrusive: both

Obsidian

Composition: felsic

Texture: glassy

Cooling Rate: fast

Intrusive or Extrusive: extrusive

Pumice

Composition: felsic

Texture: vesicular

Cooling Rate: fast

Intrusive or Extrusive: extrusive

Rhyolite

Composition: felsic

Texture: vesicular

Cooling Rate: fast

Intrusive or Extrusive: extrusive

Rhyolitic Tuff

Composition: felsic

Texture: pyroclastic

Cooling Rate: fast

Intrusive or Extrusive: extrusive

Andesite

Composition: felsic

Texture: pyroclastic

Cooling Rate: fast

Intrusive or Extrusive: extrusive

Basalt

Composition: mafic

Texture: aphanetic

Cooling Rate: fast

Intrusive or Extrusive: extrusive

Basalt Porphyry

Composition: mafic

Texture: porphyritic

Cooling Rate: non-uniform

Intrusive or Extrusive: both

Granite Pegmatite

Composition: felsic

Texture: pegmatitic

Cooling Rate: non-uniform

Intrusive or Extrusive: both

Perioditite

Composition: ultramafic

Texture: phaneritic

Cooling Rate: non-uniform

Intrusive or Extrusive: both