福州大学紫金矿业学院2009级资源勘查工程专业英语复习题(完整版)

Chapter1an introduction to geology
1.Igneous rocks are produced primarily by the deposition and consolidation of surface materials such as sand and mud.B
A.true;
B.false
2.Which statement is NOT correct?A
A.metamorphic rocks always melt and become magma
B.igneous rocks may undergo metamorphism
C.sedimentary rocks can be weathered
D.when magma crystallizes,it becomes igneous rock
3.Materials deposited by turbidity currents contribute to the formation of __A_.
A.deep-sea fans;
B.alluvial fans
C.floodplains;
D.beaches
4.All three parts (spheres)of Earth's physical environment are
interacting in this scene.A
A.true;
B.false 5.Earth’s physical environment is traditionally divided into three parts:the solid Earth,the hydrosphere,and the ____C______.
A.ecosphere;
B.metasphere
C.atmosphere;
D.thermosphere
6.Earth's gaseous envelope is the ____C______.
A.hydrosphere;
B.lithosphere
C.atmosphere;
D.biosphere
7.Which is the thinnest of Earth's different
layers?C
A.mantle;
B.outer core
C.crust;
D.stratosphere
8.Which one of the following is NOT one of the three broad subdivisions of the ocean floor?D
A.ocean basin floor;
B.continental margin
C.oceanic ridge
D.coastal plain
9.Mountain belts are one part or subdivision of regions called shields.B
A.true;
B.false
10.The crust and mantle have about the same thickness.B
A.true;
B.false
11.The__________is the zone within Earth that includes the crust and uppermost mantle.B
A.paleosphere;
B.lithosphere
C.outer core;
D.asthenosphere
12.This basic rock type forms when already existing rock is subjected to great pressures and/or intense heat.A
A.metamorphic
B.sedimentary
C.igneous
13.The____D______system is a broad,rugged,elevated feature on the ocean floor that forms
a continuous belt that winds around the globe.
A.Emperor chain
B.asthenosphere
C.deep-ocean trench
D.mid-ocean ridge
E.continental rise
14.Which portion of the continental margin is steepest?A
A.continental slope
B.continental shelf
C.continental rise
15.This diagram represents a ___A_______continental margin.
A.active
B.rifting
C.abyssal
D.passive
16.Oceans blanket about ___A_______percent of Earth's surface.
A.70%
B.10%
C.90%
D.50%
E.30%17.Continental crust is thicker than oceanic crust.A
A.true
B.false
18.This term is used to describe the totality of all life on Earth.B
A.phytosphere
B.biosphere
C.zoosphere
anosphere
19.Regions consisting of large,relatively flat expanses of ancient metamorphic rocks within the continental interior are called __A________.
A.shields
B.stable platforms
C.mountain belts
D.abyssal plains
20.On the ocean side of the continental shelf,the steep continental slope merges into a more gradual incline known as the ___D_______.
A.abyssal plain
B.deep-ocean trench
C.seamount
D.continental rise
21.What are the three basic classes of rocks described in the rock cycle?B
A.crustal,lithospheric,transitional
B.sedimentary,igneous,
metamorphic
C.volcanic,continental,lithospheric
D.weathered,sedimentary,volcanic
22.The asthenosphere is a very important zone within Earth's upper mantle.A
A.true
B.false
23.Which one of the following is NOT a principal division of the solid Earth?B
A.crust
B.troposphere
C.outer core
D.mantle
E.inner core
24.The two types of continental margins are passive and active.A
A.true
B.false
25.Which of the following is NOT one of the three major geological regions of continents?B
A.stable platforms
B.abyssal plains
C.shield
D.mountain belts
26.Deep-ocean trenches are associated with passive continental margins.B
A.true
B.false
27.One-half of the atmosphere lies below an altitude of_D__kilometers.
A.3.7
B.7.5
C.1.4
D.5.6
Chapter2plate tectonic:a scientific revolution unfolds
1.Convergent plate margins occur where two plates are moving toward one another and the movement is accommodated by:D
A.Earth getting larger.
B.one plate sliding horizontally past the other.
C.new material being added at transform fault boundaries.
D.one plate descending beneath the other.
2.Most volcanic island arcs are located near____D______.
A.an oceanic ridge
B.a transform fault
C.a rift valley
D.a deep-oceanic trench
3.Which of these plates is the largest?B
A.Nazca
B.Pacific
C.Australian-Indian
D.African
4.According to the theory of plate tectonics,plates interact mainly______A____.
A.along plate boundaries
B.near the center of each plate where stress is greatest
C.on the underside of each plate
5.As plates move apart,the gap between them is filled with molten rock called___C_______.
A.granite
B.silica
C.magma
D.gooze
6.New oceanic crust is created at divergent boundaries at a rate of about:B
A.5centimeters per century
B.5centimeters per year
C.5meters per year
D.5kilometers per year
7.At convergent plate boundaries_______B___.
A.new lithosphere is forming
B.old lithosphere is being destroyed
C.neither a or b
D.both a and b
8.At convergent plate boundaries,two plates______A____.
A.move together
B.grind past each other
C.reverse direction
D.move apart
9.Collision mountain belts form because continental crust is too buoyant to undergo appreciable subduction,and results in a collision between continental fragments.A
A.true
B.false
10.Subduction occurs because:C
A.forces created at spreading centers are causing plates to move together
B.the sediment that caps the oceanic crust acts as a lubricant to aid subduction
C.the subducting lithosphere has a greater density that the underlying asthenosphere
D.the lithosphere is warm and weak
11.The region where oceanic lithosphere descends into the asthenosphere is called___D__.
A.an accretionary wedge
B.a hot spot
C.a mantle plume
D.a subduction zone
12.Earth's rigid outer layer overlies a zone of weaker and hotter material known as the:C
A.cryosphere
B.lithosphere
C.asthenosphere
D.mesosphere
13.Along the San Andreas Fault,the Pacific plate is moving toward the northwest,relative to the North American plate.A
A.true
B.false
14.At divergent plate boundaries,two plates__D________.
A.move together
B.grind past each other
C.join to produce a larger plate
D.move apart
15.When an oceanic plate and a continental plate converge,a(n)____B______is formed along
a subduction zone.
A.asthenospheric rise
B.oceanic trench
C.oceanic ridge
D.transform fault
E.rift
16.Transform faults occur where plates slide past one another and generate new lithosphere.B
A.true
B.false
17.Earth's rigid outer layer is called:B
A.cryosphere
B.lithosphere
C.asthenosphere
D.mesosphere
18.Great earthquakes can be generated at transform fault boundaries.A
A.true
B.false
19.The lithosphere is thickest under the oceans and thinnest beneath the continents.B
A.true
B.false
20.What is the main factor that triggers the formation of magma when a cold slab of oceanic lithosphere is subducted?A
A.the subducting slab supplies water to a wedge of hot mantle rock thereby lowering its melting temperature
B.friction between the subducting slab and the mantle rock generates enough heat to trigger melting
C.the subducting slab carries sediment deep into Earth where it melts
D.the subducting plate displaces hot mantle rock which rises to form magma
21.Most volcanic island arcs are located in the_____A_____.
A.western Pacific
B.Gulf of Mexico
C.Caribbean Sea
D.South Atlantic
22.When divergent plate boundaries continue to operate within a continent,the landmass may _____CD_____.Select ALL that apply.
A.get much thicker
B.begin to subduct into the mantle
C.develop a rift valley
D.split into two smaller continents
23.Volcanoes associated with continental volcanic arcs generally_____C_____.
A.are located on islands like Hawaii
B.emit mainly lava flows
C.erupt explosively
D.erupt on the average of every1000years
24.What layer of Earth allows the plates to move?C
A.cryosphere
B.lithosphere
C.asthenosphere
D.mesosphere
25.Older oceanic lithosphere is cooler,thicker,and denser than young oceanic lithosphere.A
A.true
B.false
26.At transform fault boundaries,two plates_____B_____.
A.move together
B.grind past each other
C.join to produce a larger plate
D.move apart
27.The theory of plate tectonics holds that the outer rigid layer of Earth is broken into about a dozen major segments called shields.B
A.true
B.false
28.The Aleutian Islands,Tonga Islands,and Japan are examples of_____C_____.
A.continental volcanic arcs
B.continental platforms
C.volcanic island arcs
D.a chain of seamounts
29.Which one of these mountain belts was NOT formed by a continental collision?B
A.Himalayas
B.Andes
C.Appalachians
D.Urals
30.The mechanism that has generated the floors of the world's oceans is called_______D___.
A.ocean floor convergence
B.ocean floor construction
C.seafloor construction
D.seafloor spreading
31.Most divergent boundaries are located:C
A.in mountain regions such as the Alps and Himalayas
B.in deep-ocean trenches
C.along oceanic ridges
D.in the center of large continents
32.The mechanism that has generated the floors of the world's oceans is called____D______.
A.ocean floor convergence
B.ocean floor construction
C.seafloor construction
D.a deep-oceanic trench
33.The Andes and Cascades exemplify which of these features?D
A.deep-oceanic trench
B.oceanic ridge
C.forearc basin
D.continental volcanic arc
34.Whenever a slab of oceanic lithosphere converges with a slab of continental lithosphere ______C____.
A.the continental lithosphere descends into the asthenosphere
B.the continental lithosphere gets pushed toward the ridge
C.the oceanic lithosphere descends into the asthenosphere
D.the oceanic lithosphere gets pushed toward the ridge
35.When two oceanic plates converge,and one plate descends to form a trench,material from the melting plate often forms a(n)_____B_____at the surface.
A.continental rift
B.volcanic island arc
C.oceanic ridge
D.mountain range
36.Which of these water bodies was once a rift valley?B
ke Michigan
B.Red Sea
C.Caspian Sea
D.Black Sea
37.At divergent plate boundaries_____A_____.
A.new lithosphere is forming
B.old lithosphere is being destroyed
C.neither a or b
D.both a and b
38.Most of the largest plates____C______.
A.consist primarily of oceanic crust
B.are dominated by continental crust
C.contain large amounts of both oceanic and continental crust
Chapter 3matter and minerals
1.The ratio of silicon atoms to oxygen atoms is the same in each of the various silicate structures.B A.true
B.false
2.What is the luster of the mineral illustrated in the following photograph?A A.glassy B.pearly C.earthy
D.metallic
3.Most rocks are aggregates of minerals.A A.true
B.false
4.Identify the components of the following building block of most minerals.A A.A is silicon,B is oxygen B.A is oxygen,B is silicon C.A is silicon,B is silicon D.A is oxygen,B is oxygen
5.All minerals have a crystal form.A A.true
B.false
6.When minerals break evenly in more than one direction,cleavage is described by the number of planes exhibited and the angles at which they meet.A A.true
B.false
7.This mineral exhibits cleavage.B A.true
B.false
8.The most common group of rock-forming minerals is the ____B___.A.oxides
B.silicates
C.carbonates
D.sulfides
9.Which one of the following is NOT included in the definition of a mineral?B A.inorganic B.unordered internal structure C.solid
D.definite chemical composition
10.Granite is a common mineral.B A.true
B.false
11.Which of the minerals illustrated in the following photograph exhibits cubic cleavage?B A.left B.center C.right
12.A cubic centimeter of quartz and gold weighs 2.7and about 20grams respectively.This indicates that __A_.
A.gold has a much higher specific gravity than quartz
B.gold is much harder than quartz
C.gold is much more elastic than quartz
D.gold has a greater luster than quartz
13.All silicate minerals contain which of the following two elements?C A.iron,magnesium B.iron,silicon C.silicon,oxygen
D.magnesium,silicon
14.Which one of the following sets of two terms describes how a mineral responds to mechanical impact?C A.luster,hardness B.hardness,cleavage C.cleavage,fracture
D.fracture,crystal
form
15.Which one of the following is NOT a silicate mineral?D
A.feldspar
B.quartz
C.olivine
D.calcite
16.All ferromagnesian minerals contain one or both of these elements:A
A.iron,magnesium
B.magnesium,potassium
C.sodium,silicon
D.potassium,sodium
17.Which one of the following is NOT a property used to identify minerals?C
A.hardness
B.streak
C.texture
D.crystal form
18.The silicon-oxygen tetrahedron is a complex ion.A
A.true
B.false
19.Which of these mineral properties may be of minimal value in identifying the mineral quartz?C
A.luster
B.hardness
C.color
D.crystal form
20.Which of these silicate minerals exhibits a sheet structure?B
A.quartz
B.muscovite
C.olivine
D.feldspar
Chapter4igneous rocks
1.Igneous rock originates when hot,molten material called_D__cools and crystallizes.
A.sediment
B.skarn
C.firn
D.magma
2.Rocks that contain voids left by gases that escape as lava solidifies are said to exhibit a(n) __B___texture.
A.phaneritic
B.vesicular
C.aphanitic
D.porphyritic
3.Which of these rocks is composed almost entirely of ferromagnesian minerals?D
A.granite
B.basalt
C.rhyolite
D.peridotite
4.Igneous rocks that form from the last minerals to crystallize from magma will have a(n) ____D_composition consisting of quartz,potassium feldspar,and sodium-rich plagioclase feldspar.
A.andesitic(intermediate)
B.basaltic(mafic)
C.mafic(felsic)
D.granitic(felsic)
5.Igneous rocks rich in dark silicate minerals with about50percent silica are said to have a(n) _____B__composition.
A.aphanitic
B.basaltic
C.rhyolitic
D.granitic
6.An igneous rock with less than15percent dark minerals would have a(n)____D_ composition.
A.basaltic(mafic)
B.detrital(lithic)
C.andesitic (intermediate)
D.granitic (felsic)
7.In a rock with a porphyritic texture,the large crystals are referred to as ____C__.A.groundmass B.erratics C.phenocrysts
D.orthoblasts
8.Which one of the following is NOT a possible product of a volcanic eruption?D A.ash B.pyroclastic debris C.cinders
D.marble
9.When the minerals in an igneous rock cannot be identified,the composition can be estimated based on the percentage of phenocrysts present in the rock.B A.true
B.false
10.Which one of the following greatly affects both the size and arrangement of mineral crystals in an igneous rock?D
position of the rock surrounding the magma
B.specific gravity of the magma or lava
C.rate of tectonic uplift
D.rate of cooling of the magma or lava
11.Examine the following close-up of an igneous rock.The rock has a(n)___A_texture.
A.phaneritic
B.aphanitic
C.porphyritic
D.glassy
12.Examine this aphanitic igneous rock which has a granitic (felsic)composition.The rock's name is ___B_
_.
A.diorite
B.rhyolite
C.granite
D.basalt
13.In a rock with a porphyritic texture,the smaller crystals are referred to as ______A____.A.groundmass B.erratics C.phenocrysts
D.orthoblasts
14.Igneous rocks are classified based on their texture and mineral composition.A A.false
B.true
15.What is the texture of this rock?B A.aphanitic
B.glassy
C.porphyritic
D.andesite
16.Igneous rocks that form when lava solidifies are classified as extrusive or volcanic igneous rocks.A A.true
B.false
17.Basalt makes up the ocean crust as well as lava flows and volcanic structures on land.A A.true
B.false
18.This rock most likely formed in which of these environments?C A.a submarine lava flow
B.the top portion of a surface lava flow
C.a large,deep intrusive body
D.a very thin and shallow intrusive
body
Chapter 5volcanoes and other igneous activity
1.Intrusive igneous bodies are classified according to their shape and orientation with respect to the host rock.A A.true
B.false
2.What type of volcano may produce a nu ardente or lahar?C A.shield volcano B.cinder cone posite cone
3.What type of volcano is composed of interbedded lavas and pyroclastic deposits?C A.shield volcano B.cinder cone
posite cone
4.What type of intrusive feature is this?B A.dike B.sill ccolith D.batholith
5.What type of intrusive feature is this?C A.dike B.sill
ccolith
D.batholith
6.What type of volcano is typically the
largest?A
A.shield
volcano
B.cinder cone
posite cone
7.Magmas that
produce _A__
rock contain about 50percent silica and tend to be quite ____.A.basaltic;fluid B.rhyolitic;viscous C.rhyolitic;fluid
D.basaltic;viscous
8.Which one of the following is NOT a primary factor of magma that directly determines the nature of a volcanic eruption?D A.temperature B.amount of dissolved gases position
D.volume
9.What type of volcano is composed mostly of basaltic lava flows?A A.shield volcano B.cinder cone
posite cone
10.What type of volcano has the steepest slopes?B A.shield volcano B.cinder cone
posite cone
11.What type of intrusive feature is this?D A.dike B.sill ccolith D.batholith
12.What type of volcano produces the most violent eruptions?C A.shield volcano
B.cinder cone
posite cone
13.A volcano that takes the shape of a broad,domed structure is called a _B___volcano.A.cinder
B.shield
posite
14.What type of intrusive feature is this?A A.dike B.sill ccolith
D.batholith
15.What type of intrusive feature is this?A A.dike B.sill ccolith
D.batholith
16.Exemplified by the Hawaiian Islands,this type of volcano tends to be the largest on Earth.B A.cinder
B.shield
posite
17.__A_cones,such as Sunset Crater,Arizona,tend to have very steep slopes.A.cinder
B.shield
posite
18.This type of magma,with a silica content of about 70percent,has the greatest tendency to form pyroclastics.A A.rhyolitic B.andesitic C.migmatic
D.basaltic
19.This type of magma,with about a 60percent silica content,tends to form composite cones.B A.rhyolitic B.andesitic C.migmatic
D.basaltic
20.What type of volcano is typically the smallest?B A.shield volcano B.cinder cone
posite
cone
Chapter6weathering and soil
1.The atmospheric gas that forms a weak acid when dissolved in water is__D___.
A.oxygen;
B.argon;
C.nitrogen;
D.carbon dioxide
2.When a rock undergoes___B_______,such as frost wedging,it is broken into smaller and smaller pieces.
A.chemical weathering;
B.mechanical weathering;
C.dissolution;
D.lithification
3.In which climate would the rate of chemical weathering likely be highest?A
A.warm and moist;
B.cold and dry;
C.cold and moist;
D.warm and dry
4.Which one of the following is NOT a product of the chemical weathering of granite?B
A.clay;
B.sulfur dioxide;
C.potassium ions;
D.silica in solution
5.Which term is used to describe chemical weathering processes?D
A.disintegration;
B.sheeting;
C.thermal expansion;
D.decomposition
6.Which“tough”mineral is most likely to survive extensive chemical weathering and form sand grains on beaches or dunes?D
A.clay;
B.sheeting;
C.olivine;
D.quartz
7.When some rocks weather more rapidly or more slowly than others,it is called:C
pound weathering;
B.spheroidal weathering;
C.differential weathering;
D.sheeting
8.Unloading and sheeting are associated with:D
A.thermal expansion;
B.frost wedging;
C.talus slopes;
D.exfoliation domes
9.If granite and basalt were exposed in an area with a hot and humid climate:B
A.the granite would weather most rapidly;
B.the basalt would weather most rapidly;
C.both rocks would weather at the same rate;
D.there is no way of knowing which rock type would weather most rapidly
10.The formation of caves is associated with this form of chemical weathering.A
A.dissolution;
B.oxidation;
C.hydrolysis;
D.exfoliation
11.Which list of silicate minerals shows the order in which they would weather from least resistant to most resistant?C
A.quartz,olivine,potassium feldspar,amphibole;
B.amphibole,olivine,quartz,potassium feldspar;
C.olivine,amphibole,potassium feldspar,quartz;
D.potassium feldspar,quartz,olivine,amphibole;
12.The rate of weathering is influenced by:D
A.climate;
B.mineral composition of the rock;
C.number of joints;
D.all of the above;
E.both A and C but not A
13.Which statement regarding mechanical weathering is NOT true?D
A.allows for faster rates of chemical weathering;
B.is important in the formation of talus slopes;
C.breaks rocks into smaller pieces;
D.causes a major change in mineral composition;
14.Which one of the following is NOT a product of the complete chemical weathering of the mineral potassium feldspar?D
A.potassium ion(in solution);
B.kaolinite(clay);
C.bicarbonate ion(in solution);
D.sodium hydroxide;
E.silica;
15.Which of the following is NOT associated with an external process?B
ndslide;
B.earthquake;
C.weathering;
D.glacier;
E.stream
16.Which of the following is NOT a mechanical weathering process?C
A.frost wedging;
B.unloading;
C.hydrolysis;
D.thermal expansion
17.Breaking a rock into smaller pieces decreases the rate of chemical weathering.B
A.true;
B.false;
18.Iron oxide is the product of which one of these weathering processes?A
A.oxidation; C.hydrolysis;
C.dissolution;
18.When water freezes,its volume:B
A.decreases;
B.increases;
C.remains unchanged;
20.The feature pictured here is a(n)_____C_____.
A.delta;
B.exfoliation dome;
C.talus slope;
ccolith
21.Two headstones,one marble and the other granite,were erected in the same New England cemetery150years ago.Which headstone is likely to have the least weathered,easiest to read inscription?B
A.the marble headstone;
B.the granite headstone;
C.there should be little or no difference between the two headstones;
Chapter7sedimentary rocks
1.Angular pieces in a detrital sedimentary rock indicates the particles were not transported very far from their source prior to deposition.A
A.true;
B.false;
2.Sedimentary rocks form when the products of_____E_____are transported to a new location where they are deposited and eventually__________into solid rock.
A.melting;crystallized;
B.deposition;eroded;
C.crystallization;metamorphosed;
D.tectonism;weathered;
E.weathering;lithified
3.Which common mineral found in igneous rocks is most abundant in detrital sedimentary rocks?D
A.amphibole;
B.biotite;
C.plagioclase feldspar;
D.quartz;
4.The most common minerals in detrital sedimentary rocks are_A____.
A.clay and quartz;
B.clay and limonite;
C.limonite and hematite;
D.olivine and pyroxene;
5.The sizes of particles in detrital sedimentary rocks often indicates the energy of the transporting medium.A
A.true;
B.false;
6.Which rock type is most likely associated with a high-energy environment such as a turbulent stream?A
A.conglomerate;
B.shale;
C.rock salt;
D.Chert;
7.Rock salt and rock gypsum are examples of__C__sedimentary rocks.
A.detrital;
B.biochemical;
C.evaporate;
8.The presence of abundant feldspar in a sedimentary rock suggests that advanced stages of chemical weathering have taken place.B
A.true;
B.false;
9.Which accumulation of sediment would most likely exhibit good cross-bedding?C
ndslide debris;
B.cave deposits of travertine limestone;
C.windblown sand(sand dune);
D.salt flats in a desert basin;
10.Evaporites are examples of biochemical sedimentary rocks.B
A.true;
B.false;
11.This detrital sedimentary rock consists primarily of rounded gravel-size particles.D
A.breccia;
B.coquina;
C.shale;
D.conglomerate;
12.The most abundant chemical sedimentary rock is___E_______.
A.shale;
B.conglomerate;
C.sandstone;
D.chert;
E.none of the above;
13.Which sedimentary rock listed below has a biochemical origin?C
A.rock gypsum;
B.travertine;
C.coquina;
D.shale;
paction is a very important lithification process for which sediment?A
A.mud;
B.sand;
C.gravel;
15.Agate,jasper,and flint are all forms of chert.A
A:true; B.false;
16.Which one of the following is NOT a variety of limestone?D
A.chalk;
B.travertine;
C.coquina;
D.chert;
17.Sediments precipitated by processes such as temperature change,evaporation,and chemical activity are called biochemical sediments.B
A.true;
B.false
18.The common name for sediment consisting of particles between1/16mm and2mm is __D_.
A.clay;
B.silt;
C.cobble;
D.sand;
E.gravel
19.The single most characteristic feature of sedimentary rocks is____C______.
A.their composition;
B.their color;
C.strata or beds;
D.mineral crystals
20.Detrital sedimentary rocks are made primarily of the products of mechanical weathering.B
A.true;
B.false
21.Precipitation of dissolved material by the life processes of water-dwelling organisms produces material called____A______sediment.
A.biochemical;
B.secondary;
C.detrital;
D.clastic;
22.Detrital sediments would predominate in all of the following environments except:B
A.swamp;
B.salt flat;
C.river floodplain;
D.delta;
paction and cementation are examples of this process.B
A.crystallization;
B.lithification;
C.weathering;
D.fusion
24.Which one of the following is NOT a sedimentary structure or feature that helps geologists interpret past geological conditions?A
A.vesicles;
B.mud cracks;
C.particle sorting;
D.ripple marks
25.Limestone is composed chiefly of the mineral:A
A.calcite;
B.halite;
C.feldspar;
D.quartz;
26.Geologists use____A_to distinguish among detrital sedimentary rocks.
A.particle size;
B.method of formation;
C.color;
D.the location of the source material;
27.When substantial quantities of feldspar are present in sandstone,the rock is called:C
A.agate;
B.rock gypsum;
C.arkose;
D.travertine limestone;
28.Which sedimentary rock consists of materials that originated and were transported as solid particles?A
A.sandstone;
B.rock salt;
C.chert;
D.travertine limestone;
Chapter8metamorphic rocks
1.Metamorphic rocks can form from other metamorphic rocks.A
A.true
B.false
2.During metamorphism,elongated crystals tend to recrystallize with an orientation that is ___B_______to the direction of greatest stress.
A.parallel
B.perpendicular
3.The most common chemically active fluid involved in the metamorphic process is hot water containing ions in solution.A
A.true
B.false
4.Rocks subjected to intense heat when they are intruded by magma undergo a process called _C_.
A.tectonic metamorphism
B.searing
C.contact metamorphism
D.thermal modification
5.Which one of the following is NOT an agent of metamorphism?C
A.pressure(stress)
B.heat
C.crystallization
D.chemically active fluids
6.Which of the following is least likely to occur during metamorphism?A
A.formation of cross-bedding
B.an increase in density
C.growth of larger crystals
D.development of a foliated texture
7.When stress is applied unequally in different directions,it is termed______D____.
A.confining pressure
B.confining stress
C.differential pressure
D.differential stress
8.Which one of the following metamorphic rocks is generally nonfoliated?A。