The main factors which directly govern the development of texture in all igneous rocks are ________.
A)buoyancy, crystal settling, and partial melting
B)cooling rate, dissolved volatiles, and silica content
C)volcano or pluton size and shape
D)weathering and climate

Question

Quizplus · Accepted Answer

Cooling rate, dissolved volatiles, and silica content are the main factors that directly govern the development of texture in all igneous rocks. The cooling rate determines whether the rock will have large or small crystals, dissolved volatiles affect the pressure within the magma and can create vesicles, while silica content influences the viscosity of the magma and its ability to flow. Buoyancy, crystal settling, partial melting, volcano or pluton size and shape, weathering, and climate may affect the overall composition and appearance of the rock but do not have a direct impact on texture development.

The Main Factors Which Directly Govern the Development of Texture