amygdaloidal

/ əˌmɪɡdəˈlɔɪdəl /

adjective

1. (of a volcanic rock) containing amygdales

2. a less common form of amygdaloid

Example Sentences

Heulandite occurs with stilbite and other zeolites in the amygdaloidal cavities of basaltic volcanic rocks, and occasionally in gneiss and metalliferous veins.

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Its original repository appears to have been the volcanic and amygdaloidal rocks about its sources, which have been extensively broken down by geological mutations, during ante-historical periods.

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Occasionally we meet with igneous rocks which are more or less vesicular and amygdaloidal throughout their entire mass.

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Apophyllite is a mineral of secondary origin, commonly occurring, in association with other zeolites, in amygdaloidal cavities in basalt and melaphyre.

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The only rocks noticed when we crossed these hills on the late journey, were clay-slate, greenstone, and dark red sandstone, sometimes containing white calcareous concretions, resembling an amygdaloidal rock.

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