CHAPTER 2



The Earth Through Time, 10th Editionby Harold L. LevinChapter 15—Cenozoic EventsMultiple Choice QuestionsSelect the best answer.1.Expansion of the seafloor during the Cenozoic has lead to the formation of approximately __________ percent of the current ocean crust.a. 50b. 75c. 33d. 66 e. 252.The creation of the Isthmus of Panama lead to the formation of what ocean current?a. Canaryb. Gulf Streamc. South Pacificd. Labradore. Equatorial3.Which two southern hemisphere continents split apart in the Cenozoic?a. North and South Americasb. Europe and Asiac. Australia and Antarcticad. Africa and Asiae. Africa and Antarctica4.North America and Pacific plates came in contact with each other during the Cenozoic forming which of the following features?a. Appalachian mountainsb. Gulf of Mexicoc. Cascade Ranged. Yellowstonee. San Andreas Fault5. During much of the Cenozoic the eastern margin of North America was ___________.a. activeb. passivec. riftingd. subductinge. orogenic6.Cenozoic sediment accumulation in the Gulf Coast region exceeds _____________ meters.a. 1,000b. 6,000c. 12,000d. 38,000e. 124,0007.The Cenozoic Cordillera extended from Alaska southward to ____________.a. Floridab. Californiac. Chiled. Guatemalae. Panama8.What is the name of the Paleocene Sea that was a remnant Cretaceous epeiric sea?a. Suakb. Crystalline Calm c. Sundanced. Cannonballe. Tippecanoe9.Low sulfur coal was deposited in _____________ during the Paleogenea. forestsb. swampsc. stream bedsd. volcanic craterse. beaches10.The Green River Formation is a ______________depositional environment containing varved shales.a. fast moving riversb. mud flatsc. seas shoresd. saltwater lakee. fresh water lake11.The Green River Formation is well known for its _________ fossils.a. fishb. birdsc. plantsd. insectse. amphibians12.The Badlands of South Dakota are floodplain deposits belonging to which formation?a. White River Formationb. Green River Formationc. Florissant bedsd. Wasatch Formatione. Ft. Union Formation13. Paleoclimate indicators show a cooling trend in the beginning___________.a. Miocene Epochb. Late Eocene-Oligocenec. earliest Paleogened. Pliocenee. Holocene14.The modern Rocky Mountains topography resulted from ___________ in the Miocene Epoch.a. depositionb. lava flowsc. upliftd. normal faultse. abnormal faults15.What is the fundamental mechanism responsible for the Basin and Range Province?a. compressingb. shearingc. collisiond. stretchinge. All the above16.The Basin and Range Province is characterized by block faulting along _______.a. reverse faultsb. thrust faultsc. upliftd. normal faulte. abnormal fault17.During the Miocene Epoch volcanism along the western side of the Basin and Range Province resulting in_______________.a. compressionb. extensive lava flowsc. flat regionsd. fossil bedse. All the above18.There are numerous reasons proposed for why the Basin and Range Province formed. Which is not a proposed cause?a. Collision of a microcontinentb. Subduction of the East Pacific risec. Change in plate boundary styled. Upward pressing of buoyant subducted slabe. Convection currents19. The uplift of the Colorado Plateau resulted in which of the following?a. molasseb. flyschec. glaciersd. deep canyone. deltaics20.The Columbia Plateau is dominated by which rock type?a. Sedimentaryb. Igneousc. Metamorphicd. Fossilse. Glacial tills21.Cascade volcanism began approximately ____________ years ago.a. 20 millionb. 2 billionc. 4 milliond. 40 millione. 100,000 22.Cascade volcanism is driven by the introduction of ____________ into the mantle by the descending plates?a. lavab. waterc. feldspard. quartze. carbon dioxide23.Which of the following Cascade volcanoes erupted most recently?a. Pompeiib. Mt. St. Helensc. Mt. Vesuviusd. Mount Lassene. Mount Rainier24.Which of the following is responsible for Crater Lake?a. Streamsb. Riftingc. Meteorite impactsd. Caldera formatione. None of the above25.The Sierra Nevada formed along _____________.a. thrust faultsb. reverse faultsc. strike slip faultsd. normal faulte. Both a. and b.26.During the Paleogene Period the style of plate boundary in California shifted to ______________.a. convergentb. transformc. divergentd. subductione. Both a. and d.27.Which of the following plates are remnants of the Farallon Plate?a. Pacificb. Sierrac. Juan de Fucad. North Americane. African28.The collision between the North American and Pacific Plates resulted in the Pacific Plate changing direction from _____________ to northwest.a. northb. southc. eastd. weste. southeast29. The Pacific plate has managed to steal parts of North America including _____________.a. Oregonb. Washingtonc. Eastern Californiad. South Pacifice. Baja California30.What is the name given to marine sediments deposited between elongated submarine banks found in the Alps?a. Molasseb. Obsidianc. Schistd. Flyshe. None of the above31. India collision with Asia during the Miocene Epoch was marked by which of the following events?a. volcanismb. foldingc. thrustingd. granitic plutonse. All of the above32. Basaltic lavas formed in the early Cenozoic Era in Scotland, Ireland, Greenland, and other locations as a result of __________________. a. Greenland rifting off of Europeb. India colliding with Asiac. Antarctica residing on the South Poled. North America subducting the Juan de Fuca platee. None of the above33. During Cenozoic time, Africa developed a ______________leading to volcanism and fault controlled lakes.a. subduction zoneb. rift valleyc. transform boundaryd. flatlande. All but b.34. At the beginning of the Cenozoic, Antarctica had a semitropical climate. By the Miocene Epoch, Antarctica’s climate changed and snow began to accumulate. What caused the change in climate?a. Antarctica had recently moved on top of the South Poleb. Extensive volcanismc. Reduction of volcanismd. Antarctica separated from Australiae. Antarctica collided with Australia35. The Pleistocene Ice Age resulted in an increase in rainfall at __________.a. polesb. high latitudesc. lower latitudesd. nightfalle. Both a. and b.36. The unsorted till deposits are formed by ________________.a. Sediments being deposited by iceb. Sediments being deposited by streamsc. Sediments being deposited by lakesd. Sediments being deposited by winde. Sediments being deposited by ocean currents37.Currently parts of Canada’s crust are uplifting in response to the _____________.a. addition of modern continental glaciersb. removal of continental glaciersc. stream deposits in basinsd. exposure of the shielde. All the above38.Eastern Washington State has a landscape that is referred to as channeled scablands. What process produced this landscape?a. Transgressionb. Regressionc. Flood basaltsd. Repeat failure of ice dams across a rivere. Wind39.The Ice Age appears to be related to changes in ______________.a. speed of the Earth’s spinb. appearance of vertebrate fossilsc. size of the continentsd. solar radiatione. All the above40.What is the wobble of the Earth’s axis called?a. Rotationb. Orbitc. Precessiond. Tidese. ProjectionAnswers to Questions1.a11.a21.c31.e2.b12.a22.b32.a3.c13.a23.b33.b4.e14.c24.d34.d5.b15.d25.d35.c6.c16.d26.b36.a7.d17.b27.c37.b8.d18.a28.a38.d9.b19.d29.e39.d10.e20.a30.d40.c ................
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