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Introduction
The Metamorphic petrology is the study of rocks which have been changed (metamorphosed) by heat and pressure. They are broadly categorized into regional and contact

Factors Controlling Characteristics
The characteristics of a metamorphic rock depend on the following factors:
Composition of parent rock

Temperature and Pressure of metamorphism

Fluid

Time

Classification
The classification of metamorphic rocks is split into contact and regionally metamorphosed rocks. After this it is divided according to the “amount” of metamorphism that has taken place and/or on the mineral content.

Contact Metamorphism (based on mineral content)

Parent Rock-Metamorphic rock-Dominant Minerals-Characteristics

Limestone-Marble-Calcite-Interlocking grains. Fizzes in weak acid

Quartz-Sandstone-Quartzite-Quartz Sugary texture

Shale-Hornfels (Spotted Rock) -Micas-Dark colour


Introduction to Metamorphic Petrology topic notes