xenoblast


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xen·o·blast

 (zĕn′ə-blăst′, zē′nə-)
n.
A metamorphic mineral that does not have characteristic mineral faces due to the conditions in which it grew.

xenoblast

(ˈzɛnəʊˌblæst)
n
(Geological Science) geology a type of mineral deposit formed during metamorphism that does not have a crystalline face
References in periodicals archive ?
Graphite (2%) occurs as black xenoblasts, developing fine scales in the direction of the main foliation or sometimes microfolds.
Quartz (5%) occurs as xenoblasts of irregular edges having inclusions of epidote, titanite and clinozoisite.
Domains with Ti-clinohumite (Figures 5, 6, 7, 8a-b) and fluorapatite (Figures 7, 8a, g) are cross-cut by veinlets of very fine- to medium-grained xenoblasts of calcite.