1. What is the significance of the concept of \principal stress\? 2. Sketch a 2D stress ellipse for the case 01=5GPa and 02= 2GPa where 01 is vertical

1. Calculate the force at the base of a continental block that has a uniform thickness of 25km, length of1000km, width of500km, and density of2.70. What is the stress on the bottom of the block?

September 8, 2000 1. Describe the difference between slip and separation on a fault. 2. What type of offset() can be interpreted from the map below? Give a detailed description of your logic on the back of the page

1. Interpret the geologic history of the Grand Canyon using the diagram below. List the events in order from the oldest (at the bottom of the page) to the youngest(at the top of the page). For each event describe the principle or observation you used

1.什么是构造地质学?研究意义何在? 2.构造地质学的研究方法包括什么?你知道多少? 3.构造地质学的研究内容包括那几个方面?构造地质学的学科分类与学科交叉关?

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

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

一、基本概念 1.均匀应变与非均匀应变;2.蠕变与松驰;.压溶作用;4.晶质塑性;5.叠加褶皱;

设L为平面上的一条曲线,它的方程是r()=x()+y()j,a≤t≤B 如果ra)=r(B),而且当t12∈(a,B),1≠12时总成立r(1)≠r(t2),则称 L为简单闭曲线(或 Jordan曲线)。这就是说,简单闭曲线除两个端 点相重合外,曲线自身不相交。 设D为平面上的一个区域。如果D内的任意一条封闭曲线都可以 不经过D外的点而连续地收缩成D中一点,那么D称为单连通区域 否则它称为复连通区域