Geology 300, Physical Geology Spring 2019 Quiz Ch 19, Plate Tectonics Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The portion of a fracture zone between two offset portions of ridge crest is called a. A) normal fault B) Benioff zone C) transform fault D) strike-slip fault E) convergence zone 2) This type of plate boundary the two plates can consist of ocean-ocean, ocean-continent, or continent-continent crust. A) convergent B) transverse C) strike-slip D) divergent E) transform 3) The inner wall (of the over-riding plate) of a trench consists of a(n) of thrust-faulted and folded marine sediment and pieces of oceanic crust. A) active volcano consisting B) subduction wedge C) a gap D) large amount of sea E) accretionary wedge 4) Hess's original hypothesis was that sea-floor spreading is driven by deep mantle. A) transform faults B) convergent boundaries C) contraction D) convection E) spreading centers 5) Wegener reassembled the continents to form the super continent. A) Laurasia B) Pangea C) Madagascar D) Asia E) Gondwanaland 6) Sea-floor spreading implies that sea-floor rocks should be. A) youngest on the crest of mid-ocean ridges B) younger toward the trench C) youngest on the continental shelf D) the same age throughout E) younger as water become colder 7) Measured rates of sea-floor spreading range from cm/year. A) 1 to 24 B) 1000 to 10,000 C) 100 to 1000 D) 0.1 to 1 E) 0.01 to 0.1 Page 1 of 5 Compiled by: A. Reed Last saved: 1/29/2019 Print Date: 1/29/2019
8) The Rift Valley in East Africa is an example of a. A) continental rise B) back arc spreading center C) transform plate boundary D) diverging plate boundary E) converging plate boundary 9) The Himalayan Mountains are thought to have formed. A) by ocean-ocean convergence B) by continent-ocean convergence C) by continent-continent convergence D) at a spreading center E) at a transform fault 10) The head of large plumes that form "hot spots" may cause uplift and. A) transform faults B) andesitic volcanoes C) subduction zones D) spreading centers E) vast fields of flood basalt 11) The San Andreas Fault is in California. A) a normal fault B) a transform fault C) an oblique fault D) a thrust fault E) a reverse fault 12) proposed an explanation for magnetic anomalies. A) Harry Hess B) Alfred Wegener C) Diane Carlson D) Charles Plummer E) Vine and Matthews 13) Divergent plate boundaries can occur where spreading occurs under a continent, for example. A) the Himalayan Mountains B) the Alps C) the Red Sea D) the Gulf of Mexico E) the Mediterranean Sea 14) The apparent movement of the magnetic poles through geologic time is called. A) polar wandering B) continental drift C) polar drift D) mantle plume motion E) sea-floor spreading Page 2 of 5 Compiled by: A. Reed Last saved: 1/29/2019 Print Date: 1/29/2019
15) Evidence in support of continental drift includes. A) fit of continental margins B) glacial striation patterns C) fossil distribution on different continents D) matching of geologic patterns on continents E) all of the choices are correct 16) Alternating positive and negative polarity magnetic anomalies in the crust form a stripe-like pattern parallel to. A) aseismic ridges B) continental margins C) lines of longitude D) mid-oceanic ridges E) the equator 17) During extension in divergent plate boundaries a rift valley forms as a central. A) subduction zone B) graben C) mountain range D) strike-slip fault E) horst 18) One possible mechanism for plate tectonic drive is. A) earthquake energy B) Benioff drive C) meteor impacts D) gravity sliding E) slab pull 19) Magma heated by ocean-continent convergence may form a(n) such as the Aleutian Islands. A) convection uplift B) abyssal plain C) magmatic arc D) mantle diapir E) hot spot 20) Young mountain belts with their associated igneous intrusions, metamorphism, and fold-thrust belts form at. A) divergent boundaries B) hot spots C) transform fault boundaries D) convergent boundaries E) continental rifts 21) The basic idea of is that the Earth's surface is divided into a few large plates that move slowly relative to one another. A) sea floor spreading B) continental drift C) mantle plumes D) isostasy E) plate tectonics Page 3 of 5 Compiled by: A. Reed Last saved: 1/29/2019 Print Date: 1/29/2019
22) The isotopic ages of Hawaiian Island basalts increase regularly to the. A) northwest B) northeast C) south D) east E) north 23) volcanoes can be found along subducting plate boundaries. A) Pegmatitic B) Andesitic C) Cinder cone D) Basaltic E) Shield Page 4 of 5 Compiled by: A. Reed Last saved: 1/29/2019 Print Date: 1/29/2019
1) C 2) A 3) E 4) D 5) B 6) A 7) A 8) D 9) C 10) E 11) B 12) E 13) C 14) A 15) E 16) D 17) B 18) E 19) C 20) D 21) E 22) A 23) B Page 5 of 5 Compiled by: A. Reed Last saved: 1/29/2019 Print Date: 1/29/2019