Amygdaloid

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amygdaloid

[ə′mig·də‚lȯid]
(geology)
Lava rock containing amygdules. Also known as amygdaloidal lava.

Amygdaloid

 

an effusive rock with large, slightly elongated pores filled with secondary deposits of various minerals (quartz, zeolites, chlorites, and calcite). The term “amygdaloid” refers to the texture of the effusive rock regardless of its mineral composition. There are diabase, basaltic, porphyritic, and other types of amygdaloids. Amygdaloids are particularly common among ancient volcanic strata that have been subjected to hydrothermal alteration in the zeolitic facies of metamorphism.

References in periodicals archive ?
Contribution of the medial amygdaloid nucleus to the development of hypertension in spontaneously hypertensive rats.
Inhibition of neurons in the rat medial amygdaloid nucleus in vitro by somatostatin.
[3] Some patients have elevated dopamine D2 receptor and L-dopa (the metabolite of dopamine) and increased serotonin activity in the amygdaloid nucleus or the corpus striatum.