47) A is a tabular, concordant pluton that is nearly horizontal and forms when m

Question

47) A is a tabular, concordant pluton that is nearly horizontal and forms when magma 47) exploits a weakness between sedimentary layers 48) Crystallization of molten rock will produce 49) Which process is responsable for the oxygen in the atmosphere today? A) Dike B) Laccolith c) Sill D) Batholith A) Sedimentary C) Igneous A) Outgassing of volcanoes C) Photosynthesis B) Weathering of carbonate rocks D) Asteroid impact so) Which of the following mineralsis not a ferromagnesia eral? 50) A) Biotite Mica C) Olivine By Potassium Feldspar D) Pyroxene 51) What generates the heat necessary 51) for convection in the Earth? A) Decay of radioactive materials B) Friction between moving slabs 9) Volcanic Eruption D) Chemical reactions between geologic materials and hydrothermal Buids 52) the environment of formation for an extrusive igneous rock? A) Fast because it was erupted from a volcano B) Fast because it cooled six miles below the surface C) Slow because the magma was insulated below the surface D) Slow because it cooled in a volcanic lava flow far from the vent 53) 53) Conchoidal fractures are indicative of the mineral D) Quartz B) Muscovite C) Olivine A) Fluorite 54)- 54) Which of the following lavas make up 90% of the total volume of lava on Earth? B) Rhyolitic C) Andesitic A) Basaltic 55) What is a craton A) A down-dropped graben bounded by normal faults B) An exotic terrane being accreted to a landmass C) The highly deformed, leading edge of a continent where subduction is occurring D The oldest part of a continent that has not been significantly deformed for 600 million years 56) 56) What is the definition of orogenesis? A) Processes that collectively form a mountain belt B) Emplacement of metallic ores via hydrothermal metamorphism C) Subduction of an oceanic plate beneath a continental plate D) lonic exchange between calcium and oxygen h plate boundary accounts for the smallest percentage of all plate boundaries on the surface of 57) the Earth? B) Transform Boundaries Convergent Boundaries A) Divergent Boundaries

Explanation / Answer

47)C)Sill

48)C)Igneous

49)C)Photosynthesis

Proccess that makes glucose from light energy

50)B)Potassium Feldspar

51)A)Decay of radioactive materials

52)A)Fast because it was erupted from a volcano

53)D)Quartz

54)A)Basaltic

55)D)The oldest part of a continent that has not been significantly deformed for 600 million years

56)A)Processes that collectively form a mountain belt

57)B)Transform Boundaries

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