04-Grain Minerology ppt - Grain Mineralogy Lecture Outline...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Grain Mineralogy Lecture Outline I.Crust composition II.Quartz III.Feldspar IV.Rock fragments V.Other grains VI.Classification Reading Assignment: Boggs, Chapter 5, p. 119-139 1
Background image of page 1

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

View Full DocumentRight Arrow Icon
Crust Composition: Rock Type Continental Crust : Granite ~ 60% Feldspar, 25% Quartz 10% Mica, Amphibole Sedimentary Rocks : Mudstones , Sandstones, Carbonates 2
Background image of page 2
Net Result: Grain Types Most common grain produced is some type of Feldspar, but Feldspar weathers _rapidly_ Quartz, already abundant, is enhanced on Earth surface because it is _resistant_ to weathering Rock Fragments – mostly sedimentary, but can be metamorphic or volcanic Granite or Gneiss rock fragments are classified with Feldspar 3
Background image of page 3

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

View Full DocumentRight Arrow Icon
Breakdown of Primary Grains Types Quartz Plutonic = “common quartz” Volcanic Metamorphic = composite/_polycrystalline_ Vein Feldspar _Alkali_ Feldspar (Mostly K-Feldspar = K-spar) _Plagiocase_ Rock fragments Sedimentary (SRF) Metamorphic (MRF) Volcanic (VRF) 4
Background image of page 4
5 Sandstone Classification Scheme Q: Quartz grains F: Feldspar grains L: Lithic grains (rock fragments)
Background image of page 5

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

View Full DocumentRight Arrow Icon
Determining Composition of Sand Grains Using a Petrographic Microscope Short set of notes and photos useful for
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/07/2011 for the course GEO 416M taught by Professor Staff during the Spring '08 term at University of Texas at Austin.

Page1 / 29

04-Grain Minerology ppt - Grain Mineralogy Lecture Outline...

This preview shows document pages 1 - 7. Sign up to view the full document.

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