GEOL1010 Hour Exam 2 6 Mar 2007 1 1 This type of fault is a a reverse fault b thrust fault 2 3 c normal fault d strike slip fault e nobody s fault 2 This type of fault is a a reverse fault b thrust fault c normal fault d strike slip fault e nobody s fault 3 This type of fault is a a reverse fault b thrust fault c normal fault d strike slip fault e your fault 4 Any material that undergoes continuous plastic deformation is said to be a anisotropic b brittle c sectile d ductile e elastic 5 Deformation that is recovered non permanent on release on an applied force is said to be a isostatic b shear c compressional d plastic e elastic 6 Extensive reverse and thrust faulting in an area is an indication of regional a tectonic compression b tectonic extension c metamorphism d tectonic shear e tectonic uplift 7 At the San Andreas Fault in California the Pacific Plate has moved to the north relative to the North American Plate This is an example of a a dip slip fault b left lateral strike slip fault c right lateral strike slip fault d thrust fault e reverse fault 8 The compass direction of the intersection of any tilted planar feature such as bedding with the horizontal is the a inclination b strike c declination d dip e elevation 9 The era of dinosaurs is subdivided into Triassic Jurasssic and Cretaceous Together these are known as the a Archean b Proterozoic c Paleozoic d Mesozoic e Cenozoic 10 The age of most sedimentary rocks in Colorado is a less than 550 million years b more than 4 billion years d about 6000 years e less than 65 million years c between 2000 and 550 million years 11 The Phanerozoic Eon includes the Paleozoic Mesozoic and Cenozoic Eras and constitutes about what percentage of Earth history a 5 b 15 c 25 d 50 e 85 12 After the dinosaur extinction land mammals and flowering plants proliferated during the a Proterozoic b Cambrian c Mississippian d Tertiary e Pleistocene 13 The age of the recent great continental ice sheets is known as the a Cambrian b Mesozoic c Jurassic d Tertiary e Pleistocene 14 Which of the following radioactive isotopes is formed in the atmosphere by cosmic ray bombardment a 14C b 40K c 87Rb d 238U e 235U 15 A neutron in an atomic nucleus loses an electron and turns into a proton Which of the following accurately describes beta emission a Atomic number unchanged atomic mass unchanged b Atomic number increases by 1 atomic mass unchanged c Atomic number decreases by 1 atomic mass unchanged d Atomic number increases by 1 atomic mass decreases by 1 e Atomic number increases by 1 atomic mass increases by 1 16 Why can t 14C be used to date limestone a 14C half life too short b 14C half life too long c No C in limestone d daughter 14N not retained by limestone e 14C can only be used to date organic C taken from the atmosphere by plants 17 A conglomerate formation contains cobbles of andesite intermediate volcanic rock The andesite was dated radiometrically at 78 million years Based on this date we can infer the conglomerate layer to be a more than 78 million years old b 78 million years old c less than 78 million years old d nearly 7000 years old e no inference is possible 18 If the amount of a radioactive element is 1 8 the amount originally present how many half lives have gone by a 1 b 2 c 3 d 4 e 3 4 19 A break in the sedimentary geologic record where the older rocks have been tilted and eroded prior to resumption of sedimentation is a n a unconformity b nonconformity c disconformity d anticonformity e angular unconformity 20 A 4He nucleus that escapes from a decaying radioactive isotope is called a a Alpha particle b beta particle c gamma ray d neutron e X ray 21 A small quenched droplet of primitive condensate from the solar nebula that is included in a primitive meteorite is called a a spicule b fremdling c chondrule d nebule e breccia 22 Where in the solar system is the asteroid belt a Beyond Pluto in the outer solar system b Between the outer and inner planets c Between Earth and Mars d Between Saturn and Uranus e Inside the orbit of Mercury 23 The outermost planet in the solar system not including poor recently demoted Pluto is a Mercury b Mars c Jupiter d Neptune e Uranus 24 The inner planets are a Earth Mars Jupiter Saturn c Jupiter Saturn Neptune Uranus b Mercury Venus Earth Mars d Venus Earth Mars Jupiter 25 A sedimentary sequence of layers containing no fossils is lying on top of the weathered upper surface of a granite Both the sediments and the granite are cut by a basaltic dike What can you conclude about the relative ages of these units a Granite first sediments next basalt dike last b Sediments first granite next basalt dike last c Sediments first granite intrusion basalt dike last d Basalt first sediments next granite last e Granite first basalt next sediments last 26 A sedimentary sequence of layers containing no fossils is lying on top of the weathered upper surface of a granitic gneiss The gneiss is cut by a basaltic dike which terminates at the sediments with what looks like a weathered surface What can you conclude about the relative ages of these units a Gneiss first sediments next basalt dike last b Sediments first gneiss next basalt dike last c Sediments first granitic gneiss intrusion basalt dike last d Basalt first sediments next gneiss last e Gneiss first basalt next sediments last 27 The solid state transformation of pre existing rock into texturally or mineralogically distinct new rock is known as a sedimentation b mass wasting c lithification d metamorphism e metasomatism 28 The metamorphic facies characteristic of low pressure high temperature shallow contact metamorphic rocks is a hornfels b granulite c zeolite d blueschist e greenschist 29 The stable interior part of the continent is known as the a terrane b shield c craton d plume 30 An episode of mountain building is known as a n a allocthon b horst c graben d craton e orogeny e orogeny 31 A small slice of new continental crust added onto the margin of a continent is a n a accreted terrane b allocthon c shield d craton e epeirogeny 32 Gradual upward and downward movement of crust without extensive deformation is known as a an accreted terrane b allocthonous c orogeny d cratonic e epeirogeny 33 The Canadian Shield is a part of the a Rocky Mountain orogenic belt d North American accreted terrane b continental hot spot e Artic Ocean Basin c North American craton 34 Which of the major divisions of life forms on Earth includes both multi celled plants and animals a
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