Student Igneous RX Chart & Answer Key

Student Igneous RX Chart & Answer Key - Porphyritic...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
GEOL 101 Lab - Spring 2009 Lab 2 : Igneous Rocks Name: Partner's Name: # Rock Name Texture Color Composition Minerals Cooling History Extrusive or Intrusive 1 2 3 4 5 6 7 8 9 10 Igneous Rocks Identification Chart: Porphyritic Andesite, Basalt, Diorite, Granite, Obsidian, Pumice, Rhyolite, Scoria, Tuff, Gabrro
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
GEOL 101 Lab - Spring 2009 Lab 2 : Igneous Rocks Name: Partner's Name: # Rock Name Texture Color Composition Minerals Cooling History Extrusive or Intrusive 1 Granite Phaneritic whitish, light felsic qtz, k-spar, mica, etc slow intrusive 2 Basalt Aphanitic dark mafic amphibole, olivine, plag, pyroxene fast extrusive 3 Diorite Phaneritic intermediate slow intrusive 4 Gabbro Phaneritic dark mafic plag, olivine, pyroxene, amphibole slow intrusive 5 Obsidian Glassy gray-dark felsic-mafic very fast, "quenched" extrusive 6 Porphyritic Andesite
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Porphyritic light-medium intermediate qtz, k-spar, plag, olivine, biotite slow then rapid intrusive then extrusive 7 Pumice Vesicular light-medium felsic-intermediate micas, qtz, k-spar, plag rapid, gaseous lava extrusive 8 Rhyolite Aphanitic light felsic micas, qtz, k-spar, plag rapid extrusive 9 Scoria Vesicular dark mafic plag, olivine, pyroxene, amphibole rapid extrusive 10 Tuff (volcanic ash) Pyroclastic light-gray felsic-intermediate qz, micas, k-spar, plag rapid extrusive Igneous Rocks Identification Chart: Porphyritic Andesite, Basalt, Diorite, Granite, Obsidian, Pumice, Rhyolite, Scoria, Tuff, Gabrro qtz, plag, k-spar, amphibole, biotite micas, qtz, k-spar, plag, olivine, etc...
View Full Document

Page1 / 2

Student Igneous RX Chart & Answer Key - Porphyritic...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online