Igneous and Metamorphic Petrology

3.

Igneous Textures and Structures

3.1.

3.1.1.

Holocrystalline Textures

3.1.2.

Hypocrystalline Textures

3.1.3.

Holohyaline Textures

3.1.4.

Devitrification

3.2.

Grain Size Classifications

3.2.1.

Phaneritic Textures

3.2.1.1.

3.2.1.2.

3.2.1.3.

3.2.2.

Aphanitic Textures

3.2.3.

Porphyritic Textures

3.2.3.1.

Phenocryst Characteristics

3.2.3.2.

Groundmass Properties

3.2.3.3.

Formation Mechanisms

3.2.4.

Pegmatitic Textures

3.2.5.

Microcrystalline Textures

3.2.6.

Cryptocrystalline Textures

3.3.

Crystal Shapes and Arrangements

3.3.1.

3.3.1.1.

Euhedral Crystals

3.3.1.2.

Subhedral Crystals

3.3.1.3.

Anhedral Crystals

3.3.2.

Grain Size Relationships

3.3.2.1.

Equigranular Textures

3.3.2.2.

Inequigranular Textures

3.3.3.

Special Textures

3.3.3.1.

Trachytic Texture

3.3.3.2.

Ophitic Texture

3.3.3.3.

Subophitic Texture

3.3.3.4.

Intergranular Texture

3.3.3.5.

Intersertal Texture

3.3.3.6.

Cumulate Textures

3.3.3.6.1.

3.3.3.6.2.

3.3.3.6.3.

3.4.

Vesicular and Gas-related Textures

3.4.1.

Vesicle Formation

3.4.2.

Vesicle Shapes and Sizes

3.4.3.

Amygdaloidal Textures

3.4.4.

Secondary Mineral Fillings

3.4.5.

Pumiceous Textures

3.5.

Pyroclastic Textures

3.5.1.

Fragmentation Mechanisms

3.5.2.

Pyroclast Types

3.5.2.1.

3.5.2.2.

3.5.2.3.

3.5.2.4.

3.5.3.

Welding Processes

3.5.4.

Lithification Mechanisms

3.5.5.

Eutaxitic Texture

3.6.

3.6.1.

3.6.2.

3.6.3.

3.6.4.

Brecciated Flow Tops

3.7.

Reaction Textures

3.7.1.

Corrosion Textures

3.7.2.

Replacement Textures

3.7.3.

Overgrowth Textures

3.7.4.

Zoning Patterns

3.7.4.1.

3.7.4.2.

3.7.4.3.

Oscillatory Zoning

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2. Igneous Petrology Fundamentals

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4. Igneous Structures and Emplacement Features