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)

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

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

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）。）

一、解释下列术语： 1. 双重构造；2. 有效应力；3. 铲状断层；4. 花状构造；5. 石香肠构造与窗棂构造

Geology 3063 august 28. 2000 How can tabular-planar crossbeds be used to determine younging direction?

1. Place all books and notes on the floor. 2. Read each question carefully, then read it again. 3. ThinkThinkThinkThinkThink

褶皱几何要素在赤平投影图上的特征和求解方法

1. Place all books and notes on the floor. 2. Read each question carefully, then read it again