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physical setting earth science

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34 The three statements below are observations ofthe same rock sample:• The rock has intergrown crystals from 2 to 3millimeters in diameter.• The minerals in the rock are gray feldspar,green olivine, green pyroxene, and blackamphibole.• There are no visible gas pockets in the rock.35 Most rock gypsum is formed by the(1) heating of previously existing foliatedbedrock(2) cooling and solidification of lava(3) compaction and cementation of shells andskeletal remains(4) chemical precipitation of minerals from seawaterThis rock sample is most likely(1) sandstone (3) granite(2) gabbro (4) phylliteP.S./E. Sci.–Jan. ’06 [9] [OVER]

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