GL101 Chapter Notes - Chapter 9: Global Positioning System, Shear Stress, Reflection Seismology
Document Summary
Structural geology: a study of earth"s architecture: earth is a dynamic planet: some rocks that contain marine fossils are now high above sea level, structural geologists study the shape and forces responsible for the deformation of. Earth"s crust: rock structure interpretation has economic significance. Deformation: deformation: is a general term that refers to all changes in the original form and / or size of a rock body. Can also produce changes in the location and orientation of a rock. Most crustal deformation occurs along or near plate margins. Types of directed pressure: compressional (crush together, tensional (stretch, pull apart, shear (lateral displacement) How rocks deform: temperature and confining pressure. Brittle failure (brittle deformation): low temperatures and pressure near the surface (like glass breaking) Ductile deformation: where temperatures and pressure are high, rocks exhibit ductile behaviour, a type of solid state flow: rock type. Mineral composition and textures of rock influence deformation style.
