xenolith
xen·o·lith
X0004100 (zĕn′ə-lĭth′, zē′nə-)xenolith
(ˈzɛnəlɪθ)xen•o•lith
(ˈzɛn l ɪθ, ˈzin-)n.
xenolith
Noun | 1. | ![]() |
单词 | xenolith | |||
释义 | xenolithxen·o·lithX0004100 (zĕn′ə-lĭth′, zē′nə-)xenolith(ˈzɛnəlɪθ)xen•o•lith(ˈzɛn l ɪθ, ˈzin-)n. xenolith
Xenolithxenolith[′zēn·ə‚lith]Xenolitha rock fragment that is foreign to the igneous rock in which it occurs. If the igneous rock enclosing the xenolith solidified at a great depth, then the xenoliths are usually greatly altered fragments of those rocks into which the magma intruded. But if the xenoliths are enclosed in the lava of a volcano, then they are usually fragments from the walls of the volcanic vent. The dimensions of the xenoliths vary greatly; they may be as small as individual crystals and their fragments, which can be distinguished only under a microscope (xenocrysts), or as large as several dozens or hundreds of meters. xenolith
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