Multiple Choice Questions for Plutonic and also Volcanic Igneous Rocks - Chapters 3 and also 4Each chapter will include a few concerns designed to test your expertise of material covered in the chapter and in the Internet-based sources. Your answers are not being taped. Try the following. The rate of cooling of a magma or lava is reflected by the ________ of the rock.mineralogytexturecolordensityThe temperature (at leastern a minimum estimate) from which the melt cooled is reflected by the _________ of the rock.mineralogytexturecolordensityWbelow would certainly you suppose to discover the biggest crystals in a lava flow?near the top surconfront of the flowin the center of the flowclose to the bottom of the flowthe crystals would have actually the same grain dimension throughout the flowAccording to Bowen"s reaction series, which of the following pairs of phases are most likely to be incompatible?quartz and alkali feldsparCa-Plagioclase and also olivinequartz and also olivineNa-plagioclase and amphiboleThe last mineral (assuming that the composition is appropriate) to crystallize from a magma is:plagioclaseolivinequartzpyroxeneThe fine grained (aphanatic) identical of a granite is a:rhyolitegabbroandesitebasalt
Grains are alkali feldspar and also quartz. The size of the figure is around 2 cm.The diagram above the majority of likely represents a ___________ extrusive igneous rockintrusive igneous rockclastic sedimentary rockchemical sedimentary rockThe coarse grained equivalent of a basalt is a:rhyolitegabbroandesitebasaltDescribe the plate tectonic settings wright here you would certainly suppose to find granitic/rhyolitic rocks:subduction zonecontinent/continent collisionspanalysis centertransdevelop boundaryDescribe the plate tectonic settings wbelow you would certainly intend to find andesites:subduction zonecontinent/continent collisionspanalysis centertransdevelop boundaryDescribe the plate tectonic settings wbelow you would certainly mean to discover basaltic rocks:subduction zonecontinent/continent collisionspreading centertransdevelop boundaryWhich have to offer the leastern resistance to circulation - a basaltic lava, an andesitic liquid or a rhyolitic liquid?basaltandesiterhyoliteWhich is more most likely, a granite dike, a diorite dike or a gabbro dike?granitedioritegabbroWhich of the following minerals can be uncovered in a granite dike?amphibolemuscovitebiotiteall of theseCrater Lake, Oregon, is a lake within a:sillcratercalderavolcanic neck Residents at the base of which among the complying with would face the greatesthazard of a nuee ardente?shield volcanocinder conegeyserstratovolcano The continental crust is most prefer _______________.graniterhyolitebasaltgabbroThe oceanic crust is the majority of favor _______________.graniterhyolitebasaltgabbroWhat type of volcanic rock consists of a large variety of cavities (bubbles) that develop as soon as gases escape from the molten rock?graniteobsidianpumicebasaltWhat is the effect of water on melting (assuming the rock does not contain any type of hydrous minerals)?water raises the melting temperature of rockwater lowers the melting temperature of a rockwater neither raises nor lowers the melting temperatureThroughout crystallization of a melt plagioclase become richer in __________ .potassiumsodiumcalciumkryptonAt about what temperature carry out olivine and also Ca-well-off plagioclase crystallize from a magma?500 degrees C1000 degrees C1500 levels C2000 levels CWhich of the following is a concordant intrusive rock?dikesillstockbatholithWhat type of igneous rock would contain 10 mm lengthy plagioclase crystals surrounded by 0.5 mm long crystals?porphyryobsidianphaneriticaphanitic Which of the following pairs of intrusive and also extrusive rocks have the very same chemical composition?granite and andesitediorite and basaltgabbro and also basaltgabbro and also rhyoliteWhich of the adhering to best describes a granite?a light-colored, fine-grained igneous rock well-off in silicaa light-colored, fine-grained igneous rock poor in silicaa light-colored, coarse-grained igneous rock affluent in silicaa light-colored, coarse-grained igneous rock poor in silicaWhich of the following ideal describes a basalt?a dark-colored, fine-grained igneous rock well-off in silicaa dark-colored, fine-grained igneous rock poor in silicaa dark-colored, coarse-grained igneous rock wealthy in silicaa dark-colored, coarse-grained igneous rock bad in silicaMost igneous rocks contain ___________SiO2 by weight.much less than 40%in between 40% and 70%between 70% and 90%higher than 90%Which of the following minerals is the many abundant mineral in ultramafic rocks?amphiboleolivinesodium plagioclasequartzWhich of the complying with statements about mafic rocks is true?mafic rocks are richer in silica than felsic rocksmafic rocks crystallize at higher temperatures than felsic rocksmafic rocks are even more viscous than felsic rocksmafic rocks tfinish to be lighter in color than felsic rocks.Which of the adhering to igneous rocks crystallizes near the Earth"s surface?basaltgabbrodioritegraniteWhat is the approximate silica content of a granite?20%50%70%100%Which of these minerals is generally discovered in both mafic and also felsic rocks?quartzalkali feldsparplagioclase feldsparolivineWhich of the adhering to is NOT an extrusive igneous rock?basaltandesiteobsidiangranite Felsic => Intermediate => =>MaficWhich of the adhering to properties increases in the direction of the arrows in the sentence above?melting temperaturepotassium contentsilica contentviscosityWhat type of magma develops at mid-ocean ridges?basaltandesiteultramaficgraniteA porphyritic igneous rock includes phenocrysts of olivine and also calcium-wealthy plagioclase in an aphanitic groundmass. This is a __________?andewebsite porphyrybasalt porphyrygabbro porphyryrhyolite porphyryA porphyritic igneous rock consists of phenocrysts of olivine and calcium-rich plagioclase in an phaneritic groundmass.
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This is a __________?andewebsite porphyrybasalt porphyrygabbro porphyryrhyolite porphyryWhat is the dominant rock form on most of the Hawaiian Islands?basaltandesiteultramaficgraniteWhat is the leading rock type at the facility of the Sierra Nevada Mountains?basaltandesiteultramaficgraniteWhat is the effect of water on melting?water raises the melting temperature of a rockwater lowers the melting temperature of a rockwater does not readjust the melting temperature of a rockthis depends on how a lot water is present
Which of the following scenarios would certainly bring about melting of Albite plus Water?raise the Pressure (P)raise the Temperature (T)either raise the Prescertain (P) or raise the Temperature (T)decrease either the Temperature (T) or Pressure (P)During crystallization of a magma the plagioclase feldspar __________.is replaced by quartzis reinserted by pyroxenebecomes richer in calciumbecomes richer in sodiumWhich mineral is not component of the discontinuous reaction series?plagioclaseolivinepyroxeneamphiboleAt around what temperature do olivine and calcium-rich plagioclase crystallize from a melt? (answers are in levels centigrade)500100015002000Which of the adhering to minerals crystallizes first from a basaltic magma?quartzbiotitepyroxeneolivineHow does a magma make room for itself in order to rise with the crust?by wedging open up the overlying rockby breaking off big blocks that sink into the magma chamberby melting the neighboring rocksevery one of theseHow have the right to a sill be distinguished from a lava flow?a sill is generally coarser-grained than a lava flowthe rocks over and also below a sill will certainly show evidence of heating yet just the rocks listed below a lava flow will certainly show proof of heatingsills mainly do not have actually vesicles; lava flows mostly have actually vesiclesall of theseWhich of the complying with is not a volcanic arc that overlies a subduction zone?Aleutian IslandsHawaiian IslandsCascade RangeJapanese IslandsWhat form of silicate minerals on the disconsistent side of the reactivity series crystallize at the greatest temperatures?isolated tetrahedralsingle chainsheetframeworkAs a magma changes from mafic to felsic, which of the complying with aspects decreases?sodiumpotassiumsiliconironWhich of the complying with statements is false?mafic magmas are more viscous than felsic magmasmafic magmas are hotter than felsic magmasmafic magmas contain even more calcium than felsic magmasmafic magmas contain much less silicon than felsic magmasWhich of the following properties does not depfinish on the chemical complace of an igneous rock?grain sizemelting temperaturemineralogyviscosityCompared to felsic magmas, mafic magmas are reasonably enriched in:calciumironmagnesiumall of the aboveA glassy texture indicates:extremely quick coolingsluggish coolingslow-moving complied with by quick coolingnone of the abovePyroclastic rocks develop by:a lava cooling on the surface of the Earthviolent, explosive volcanic eruptiona magma cooling slowing in the subsurfacetwo phases of cooling, one rapid and also one slowThe existence of phenocrysts in an igneous rocks indicate:a lava cooling on the surconfront of the Earthviolent, explosive volcanic eruptiona magma cooling slowing in the subsurfacetwo phases of cooling, one quick and also one slowVesicles in an igneous rock develop from:escaping gasesphenocrysts resolve to the bottom of the magma chamberfalling ashevery one of the aboveThe disconstant branch of Bowen"s reactivity series consists of minerals via ________ frameworks.isolated tetrahedrasingle chainsdouble chainsall of the aboveBatholiths are connected with:plateau basaltsoceanic islandsfolded mountainsevery one of the above
Which of the complying with rock kinds is shown in the diagram above?basaltrhyolitegabbrodiorite
Which of the following rock forms is illustrated in the diagram above?felsicintermediatemaficultramafic
In the basalt sample shown above, the vesicles (small spherical cavities) many most likely formedby ___________.the escape of gas bubbles dissolved in the lave throughout eruptionthe weathering and erosion of olivine crystals after the eruptionair bubbles entrained in the flow throughout the eruptionvaporization throughout underwater eruption
What mineral occurs in box I of Bowen"s Reaction Series (above)amphiboleCa-affluent plagioclaseolivinequartzWhat mineral occurs at allude II of Bowen"s Reaction Series (above)Na-wealthy plagioclaseCa-well-off plagioclaseolivinequartzWhat mineral occurs in box III of Bowen"s Reactivity Series (above)Na-wealthy plagioclasemuscoviteolivinequartz
Which of the complying with volcanic chains developed at a tectonic setting similar to "A"?Aleutian IslandsAndes MountainsCascade RangeHawaiian IslandsWhat form of lava is the majority of likely to erupt at tectonic establishing "B"?andesiticbasalticrhyoliticnamong the aboveWhich of the complying with volcanoes developed at a tectonic setting equivalent to "C"?Hekla, IcelandMauna LoaMount Pelee, MartiniqueMount St. HelensTry these fill-in-the blanksRerotate to the Physical Geology Home Page