单词	serpentinite
释义	serpentinite /ˈsəːp(ə)ntɪˌnʌɪt / noun [mass noun] Geology A dark, typically greenish metamorphic rock, consisting largely of serpentine or related minerals, formed when mafic igneous rocks are altered by water.It has also been found in silica-poor igneous rocks, such as syenite, nepheline syenite, serpentinite, and lamprophyre.... Compositionally, the turbidites are mostly feldspathic litharenites with trace amounts of serpentinite, anorthosite and mafic volcanic clasts. The resulting rock, called serpentinite, has a much lower density than the original peridotite, thereby increasing the relative buoyancy of the future ophiolite - and with this its chances of obduction. Origin 1930s: from serpentine + -ite1.
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