ESC. 2000 Chp 7 Quiz.docx - subduction oceanicrifting...

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A fold-thrust-belt is associated with    subduction.    oceanic rifting.    continental rifting.    a transform fault. FEEBACK: A fold-thrust belt forms on the continent adjacent to a subduction zone and  consists of numerous thrust faults that form as the result of compression.   Question 2 1 / 1 pts A horizontal line on Earth's surface has a plunge of    0 ° .    90 ° .    greater than 120 ° .    45 ° . FEEDBACK: If something is horizontal, it has 0 °  of plunge; vertical plunge is 90 ° .   Question 3 1 / 1 pts A series of anticlines and synclines forms as a result of
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   compression.    shear stress.    uniform pressure.    tension. FEEDBACK: Compressional stress from one direction, when the rock is squeezed from  one end, will form a series of anticlines and synclines.   Question 4 1 / 1 pts According to the principle of isostasy, tall mountains    sink shallowly into the mantle.    have no roots as all the rock is above the surface.    have shallow roots.    have deep roots. FEEDBACK: According to the principle of isostasy, the higher the mountain, the deeper  the roots. In other words, the bases of higher mountains sink more deeply into the  mantle.   Question 5 1 / 1 pts Brittle deformation
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  occurs when many atomic bonds are broken quickly and rock pieces separate.     produces folds, like anticlines or synclines.    is favored by high-temperature, high-pressure conditions.    is more likely to occur deep in the crust than at the surface. FEEDBACK: During brittle deformation, many atomic bonds break and stay broken,  leading to the formation of permanent cracks and separated rock pieces. Plastic  deformation is likely to occur deep in the crust and at high pressure and high  temperature conditions, and to produce folds. Brittle deformation is more likely to  produce cracks or fractures.   Question 6 1 / 1 pts Continental lithosphere that has not experienced a mountain-building event in at least  one billion years is called a(n)    craton.    dome.    delamination.    basin. FEEDBACK: Continental lithosphere that is stable with no mountain-building events in  at least the past billion years is a craton. Delamination is the removal of some of the  lower lithosphere. A dome is a circular structure with the oldest rocks in the middle. A  basin is a bowl-like structure with the youngest rocks in the middle.
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  Question 7 1 / 1 pts Depending on the direction of force (red arrows in the diagrams), stress is categorized  as compression, tension, shear, or pressure. Which of the following diagrams shows  tension?
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