A rounded mass of secondary mineral found in volcanic rock

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  • amygdule — [ə mig′do͞ol΄, ə mig′dyo͞ol΄] n. [< L amygdala, ALMOND: from the typical shape] a small gas pocket, usually found in volcanic rock, partly or completely filled with a mineral, esp. a zeolite, calcite, or quartz: sometimes called amygdale [ə… …   English World dictionary

  • Amygdule — Amygdules form when the vesicular cavities (created by expanding gas bubbles in volcanic lava) are filled with a secondary mineral such as calcite, quartz, chlorite or one of the zeolites, which are deposited by having minerals wash through the… …   Wikipedia

  • amygdule — /euh mig doohl, dyoohl/, n. Petrol. one of the mineral nodules in an amygdaloid. [1875 80; AMYGD(ALA) + ULE] * * * Secondary deposit of minerals found in a rounded, elongated, or almond shaped cavity in volcanic rock. The cavities (vesicles) were …   Universalium

  • amygdule — GLOSSARY OF VOLCANIC TERMS An individual vesicle which has been subsequently filled in by secondary minerals …   Glossary of volcanic terms

  • amygdule — amyg·dule …   English syllables

  • amygdule — /əˈmɪgdjul/ (say uh migdyoohl) noun → amygdale …  

  • amygdule — …   Useful english dictionary

  • pipe amygdule — noun : an elongated nodule resembling a tube in an amygdaloid …   Useful english dictionary

  • amygdale — a·myg·dale (ə mĭgʹdāl) n. An amygdule.   [From Latin amygdala, almond. See amygdala.] * * * …   Universalium

  • igneous rock — Any of various crystalline or glassy, noncrystalline rocks formed by the cooling and solidification of molten earth material (magma). Igneous rocks comprise one of the three principal classes of rocks, the others being metamorphic and sedimentary …   Universalium

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