xenocryst

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xenocryst

[′zēn·ə‚krist]
(crystallography)
A crystal in igneous rock that resembles a phenocryst and is foreign to the enclosing body of rock. Also known as chadacryst.
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References in periodicals archive ?
and Kong, J., 1999, Crust-mantle coupling; evidence from mantle-derived xenocrystic garnets, in Gurney, J.J., Gurney, J.L., Pascoe, M.D.
A fourth grain (Z1) is slightly older at 413.8 [+ or -] 0.9 Ma and is interpreted as xenocrystic, or it may contain an inherited core component, and was therefore excluded from the mean.
The remaining data are either concordant or scattered due to the presence of older xenocrystic zircon.