1. Distribution of Deformation in the Crust divide the crust into deformation regimes based on temperature and depth A. Upper Crust (0 - 50 km)

1. Distribution of Deformation in the Crust divide the crust into deformation regimes based on temperature and depth A. Upper Crust (0 - 50 km)

Tectonic Earthquakes Most earthquakes occur at plate margins due to tension, compression or shearing forces. Rocks at plate margins are in constant motion and are being pushed, pulled, bent, twisted and folded

There will be a brief review of chapters 7 ñ 11 at the end of this lecture. There will be no lecture on Tuesday, November 13, 2001 (Reading Days)

Brittle deformation = the permanent change that occurs in a solid material due to the growth of fractures and/or sliding on fractures. A fracture is a surface of discontinuity (includes cracks, joints and faults). Faults result from shear stresses, and joints result from tensile stresses:

what you always wanted to know about folds, faults, and joints Stress = the force applied to a plane divided by the area of the plane

成都理工大学：《普通地质学及地貌》课程电子教案（PPT教学课件）绪论（主讲：陶晓风、李亚林）

一、变质作用的概念 二、变质作用的影响因素 三、变质作用的主要类型 四、变质作用的基本规律 五、内动力地质作用－变质作用

第二章地质构造 geologic structure ·地壳运动 东地中海死淘 非 -400m)亚 升降运动(造陆)在形液 水平运动(造山 世界六大板示

本讲要点： 双轴应力状态的概念； 双轴莫尔圆及其物理意义； 有关应变的一些基本概念； 应变椭球体及其地质意义；