Igneous Rock Textures and Classification Based on Grain Size and Shape - Igneous Petrology

This course explains how igneous rock textures form through crystallization, including the effects of thermodynamics, nucleation, growth, diffusion, and viscosity. It classifies textures by grain size and crystal shape, covering terms such as phaneritic, aphanitic, pegmatitic, glassy, euhedral, anhedral, porphyritic, and vesicular.