Petrology Lecture Notes by John Brady

This page covers the following
topics related to Petrology : Introduction, Rock Names, IUGS Igneous Rock
Classification, Using the Camera Scales, Norms, Norm Calculations, Gram Formula
Weights, Sample Spreadsheet, Diopside-Hypersthene Sample Spreadsheet, Phase
Diagrams, Composition Axes, Binary Phase, Diagrams, Some_Binary_Diagrams, The
Lever Rule, G-X vs T-X Diagrams, Triangular Graph Paper, Ternary Phase Diagrams,
Halide Isothermal Sections, Phase Diagram Implications, Granite System, Liquidus
Diagram at 1 atmosphere, Isothermal Section at 1040°C, Isothermal Section at
1200°C, Igneous Geochemistry, Trace Elements, Equations for Radioactive Decay,
Metamorphism, Metamorphism Introduction, Some Mineral Stabilities During
Metamorphism, Geologic Pressures, A Steady-State Geothermal Gradient, ACF
Metamorphic Facies, CMS Assemblages, CMS Reactions, AFM Diagrams, Frank Spear's
paper on animated AFM diagrams.

**Author(s):** John Brady

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