English

Quiz "Types of rock"

Types of rock

an unconsolidated mixture of rock fragments that is coarser than sand

Types of rock

a dark coarse-grained basic plutonic igneous rock consisting of plagioclase feldspar, pyroxene, and often olivine

Types of rock

a dark coarse-grained igneous plutonic rock consisting of plagioclase feldspar and ferromagnesian minerals such as hornblende

Types of rock

an impure opaque microcrystalline greyish-black form of quartz that occurs in chalk. It produces sparks when struck with steel and is used in the manufacture of pottery, flint glass, and road-construction materials. Formula: SiO2

Types of rock

a coarse-grained plutonic igneous rock consisting of equal amounts of plagioclase and orthoclase feldspar, with ferromagnesian minerals
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