Geol201 Geology wint05 quiz2 - GEOL 201 WINTER 2005 QUIZ#2...

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Unformatted text preview: GEOL 201 WINTER 2005 QUIZ #2 49/6 YOUR NAM._;__k; __\_ SHORT ANSWER “ESSAY” 5 POINTS EACH List three methods geologist use to correlate rock. 4 O 9) 911135an \ tan-i'inu +7 ,. (of/{{g—L/M Lb) £055)” ’ SH" 115/ for. lg 4'99“ What is the age of the oldest readily identifiable fossils? V0 3..§ bollion W5 Study the image of the metamorphic rock on the screen. The rock is shown in its naturally occurring position (relative to geographic coordinates. What was the direction of compressive stress when this metamorphic rock was forming? NY) Afor‘l‘k +0 son-FA pg Say». 49 "L'i’jL This' rs a photo of a volcanic rock that was deposited on a drying lake bed. What was the original “up direction”, toward the bottom of the shoe in the photo, or away from the bottom of the shoe' in the photo? E) amb 923m bo‘HoM 516p §H0€_ (\Yfiod'lnL saw} This rs a photo of a graded bed. What was the original “up direction" when this sediment in this rock was deposited (A, B, C, or D)? B A 0mm Lba‘Hem, Jinx—8+0? What type of fault is the Harkonnen Fault? Be specific (i. e. ,dip slip or strike slip rs not enough). B (avast, dip— slip gar-«H- When did the Harkonnen fault become inactive? E) iDMY 41m“ 5 million new; use bu‘f Soow +"\‘\r\ $5 million W «3° MULTIPLECHOICE. PLEASE WERYOURANSWER ONASCANI'RONWRMAPOINTS EACH 1) What type of unconformity separates the Atreides 5) Which of the following can trigger relatively rapid mass Schist from the Alia Conglomerate? wasting? a Angular unoonforrnity a) Earthquakes Disconfonnity b) Heavy rainfall Nonconformity c The extra weight of buildings on a hillside d) biconforrnity All of the above. 2) What is the oldest rock exposed in the Caladan River 6) True or false: mudflows are more likely to occur in gorge? places with arid climates than in places with wet _ climates. a) Leto Limestone :: Alia Conglomerate True Atreides Schist b) False Kynes granitic batholith 7) Why are mudflows common on young volcanoes? 3) What is the youngest rock exposed in the Caladan River gorge? a) Young volcanoes are typically covered with ash, which is readily mobilized Usul Conglomerate b) Water released from glaciers melted by hot lava b) Muad' Dib Dolomite or pyroclastic flows can trigger a mudflow. c) Kynes granitic batholith c) Young volcanoes are only found in places with d) mafic dike climates conducive to mudflows. ® Both a and b. 4) Why did the 1970 debris avalanche in Yungay, Peru occur, and why did it move so rapidly? a) The terrain near Yungay consisted of steep slopes 8) Which of the following best define afioodplain? and great relief A broad strip of land built up by sedimentation on b) Abundant loose rock debris, ice, and water were either side of a stream channel. present where the slide originated and along its path. b) An area subject to flooding during high tide c) Earthquakes occur in the Yungay area, and an c) An irrigated tract of land used for rice farming earthquake triggered the slide. I d) The part of a stream where deepest flow occurs. All of the above GREEN QUIZ P. 1 GEOL 201 WINTER 2005 QUIZ #2 9) 10) Which of the following is true regarding the sediment that constitutes a floodplain? a) In many places it consists of fine-grained sediment interrupted here and there by coarse- , grained channel deposits. b) In many places it consists of fining-upward sequences in which coarse-grained channel deposits are covered by medium-grained point bar deposits and fine-grained flood deposits. c) It consists of intertidal sand deposits that are characterized by symmetrical ripples. @Bothaandb What hazard(s) may occur as a result of building concrete floodwalls to protect cities from flooding? (/a; “ Development of bottlenecks, which causes streams to back up and cause flooding upstream ‘ < b)”: Constriction of stream channels, which leads to greater erosive power downstream of the concrete floodwall. c) Increase in temptation for local citizens to paint graffiti, which contaminates stream water «”13 Both a and b. 11) 12) When do organisms that reproduce sexually appear in the fossil record? a) 4.5 billion years ago b 3.5 billion years ago [.4 billion years ago d) Between 700 and 550 million years ago According to the fossil record, when did the most widespread extinction occur? a) Immediately preceding the start of the Cambrian Period At the end of the Raleozoic Era bi At the end of the Cambrian Period d) At the end of the Mesozoic Era 13) Which of the following is the best definition of a 14) nonconformity a) The contact representing missing strata that are parallel to one another. b) A contact along which younger strata overlie an erosion surface cut in tilted or folded layered rock. @ An erosion surface cut in plutonic or metamorphic rock overlain by younger sedimentary or volcanic rock. d) None of the above define a nonconformity. Soils characterized by organic-rich, nearly black surface horizons are found in which of the following localities? a) Midwestern USA b) California coast south of the Bay area Southeastern USA Both a and b YOUR NAME . 15) Strongly weathered soils low in plant nutrients and rich in clay are found in which of the following localities? a) Midwestem USA b) California coast south of the Bay area Q? Southeastern USA Both a and b 16) What type of soil is most likely to be found in an area underlain by relatively young volcanic ash? a) Oxisols fl) Andrsols c) I-Iistosols d) Vertisols 17) Why does spheroidal weathering occur? a) Water penetrates rocks through cracks that are at right angles to each other. b) Surface area is greatest at edges and corners of cracks. so chemical weathering is accelerated on these parts of the rock. c) Most underground-dwelling rodents make circular burrows, and adjacent rocks reflect this process. CE Botha and b. GREEN QUIZ P. 2 ...
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