《构造地质学》课程教学资源（PPT课件讲稿）郯庐断裂带晚白垩世——早第三纪的伸展活动

Chapter 2 Primary Sedimentary Structures Main types of bedding Determination of younger direction of beds from primary structures Types of stratigraphic break Angular unconformity Soft sedimentary structures

Review Show the homework and note book on your desk Practise measurement of attitude of planes and lines in the models

Main Bedding Types Bedding Shape level bedding ripple bedding Main Types of plate laminae

Determination of the relative movement of the two walls from the tension joints

TERMINOLOGY FOR DISPLACEMENT a is the rake angle

一、名词解释（20 分，每小题 2 分） 1. 递进变形：从初始状态至最终状态之间，岩石变形的全过程，用于理解和描述变形 过程（演化）。）

The change in volume or shape of an object that results from stress is called strain. The response of rocks to stress can be divided into - elastic response: rock returns to original shape - ductile or plastic response: permanent deformation without fracture; occurs above the so-called elastic limit

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