Chapter 10 - Multiple-Choice Questions 1) Which one of the...

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Multiple-Choice Questions 1) Which one of the following statements regarding rock deformation and strength is correct? A) Rupture and plastic deformation occur when stresses exceed the elastic limit of a material. B) Rocks undergo plastic deformation less readily as temperatures and pressures increase. C) Elastic deformation is accomplished through internal flow of material. D) When rocks are subjected to stress for long time periods, very small, plastic deformations accumulate to produce large, permanent, elastic deformations. Answer: A Diff: 1 2) Which one of the following stress situations results in folding of flat-lying, sedimentary strata? A) horizontally directed; compressive stresses B) vertically directed; extensional or stretching stresses C) horizontally directed; extensional stresses D) vertically directed; compressional stresses Answer: A Diff: 1 3) Which one of the following is consistent with deformation by folding? A) Horizontal distance is shortened perpendicular to fold axes. B) The crust is thinned. C) The crust is stretched and elongated. D) Horizontal distance perpendicular to fold axes is lengthened. Answer: A Diff: 1 4) Which one of the following is true for anticlines but not for synclines? A) The limbs dip or are inclined towards the fold axis. B) Some may be asymmetric and some may have plunging axes. C) The deeper strata are buckled upward along the fold axis. D) After erosion, the younger strata are exposed along the axial region of the fold. Answer: C Diff: 1 5) A deeply eroded, structural basin would exhibit __________. A) outcrops of the oldest strata in the center of the basin B) strata oriented in roughly circular, outcrop patterns C) strata dipping outward away from the center of the basin D) older strata at the edges of a basin dip away from a central, horizontal, fold axis Answer: B Diff: 2
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6) A __________ fault has little or no vertical movements of the two blocks. A) stick slip B) oblique slip C) strike slip D) dip slip Answer: C Diff: 1 7) In a __________ fault, the hanging wall block move up with respect to the footwall block. A) normal B) inverse C) reverse D) abnormal Answer: B Diff: 1 8) In thrust faulting, __________. A) grabens develop on the footwall block B) the crust is shortened and thickened C) horizontal, tensional stresses drive the deformation D) the hanging wall block slips downward along the thrust fault Answer: B Diff: 1 9) Which one of the following would not be a characteristic of the San Andreas fault zone? A) steep, near vertical, dip-slip, fault scarps B) sag ponds C) deformed, broken, and pulverized bedrock D) laterally offset stream channels Answer: A Diff: 1 10) A graben is characterized by __________.
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Chapter 10 - Multiple-Choice Questions 1) Which one of the...

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