amygdaloidal


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Related to amygdaloidal: trachytic, spherulitic, Amygdules

a·myg·da·loid

 (ə-mĭg′də-loid′)
n.
A volcanic rock containing many amygdules.
adj. also a·myg·da·loi·dal (-loi′dl)
1. Shaped like an almond.
2. Anatomy Of or relating to the amygdala.
3. Resembling a volcanic rock that contains many amygdules.

[Latin amygdala, almond; see amygdala + -oid.]

amygdaloidal

(əˌmɪɡdəˈlɔɪdəl)
adj
1. (Geological Science) (of a volcanic rock) containing amygdales
2. (Geological Science) a less common form of amygdaloid2
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.amygdaloidal - shaped like an almondamygdaloidal - shaped like an almond    
rounded - curving and somewhat round in shape rather than jagged; "low rounded hills"; "rounded shoulders"
References in periodicals archive ?
siliquaria occurs as amygdaloidal mounds, which are 3-4 mm wide and 7-8 mm long, up to 2-3 mm high, pointed on both sides, with a median longitudinal keel.
An orange brown secondary material, probably after olivine and amygdaloidal carbonate filling are the secondary phases.
Excavated in dense to soft medium-grained amygdaloidal basalt (3) about 500 metres above sea level, Kanheri, with more than 110 excavations, is one of the largest enclaves in the country.
It is disconformably overlain by the Ludlovian Bryant Point Formation, which is composed of greyish-green to maroon, locally highly porphyritic and amygdaloidal basaltic flows with plagioclase phenocrysts up to 3 cm in length.
The five stages in the paragenetic sequence can be seen in the four zones within the Fanwood quarry's amygdaloidal horizons.
The amygdaloidal structures are very rare (sample no.
Hollabaugh 9:00 SEDIMENTATION IN VESICLES; INTERPRETATION OF GEOPETAL FABRICS IN AMYGDALOIDAL AGATES**, Jake L.
Conditions favouring zeolitization occurred in a terrestrial lava flow of amygdaloidal trachyandesite, which belongs among volcanic products of the Ceske stfedohofi Mts.
In an amygdaloidal basalt flow 4 miles southwest of Houghton, Michigan, H.
2] prospect area has identified altered and unaltered, locally amygdaloidal, felsic porphyries, felsic volcanic breccias and a rhyolite dyke.
Natrolite occurs with other zeolites in the amygdaloidal cavities of basaltic igneous rocks.