Xenomorph (geology)
This article is about the geological term. For other uses, see Xenomorph (disambiguation).
Not to be confused with Xenolith.
This article does not cite any references or sources. (December 2009) |
A xenomorph (also: allotriomorph) is a mineral that did not develop its otherwise typical external crystal form because of late crystallization between earlier formed crystals. Xenomorphs are typical of matrix minerals in rapidly crystallizing volcanic lavas and shallow igneous intrusions. It is also typical of the interstitial or cementing minerals formed during the diagenesis of sedimentary rocks. The opposite is an idiomorph in which the external form is controlled only by the internal crystal structure.
40x30px | This article related to petrology is a stub. You can help Oilfield Wiki by expanding it. |
fr:Xénomorphe (minéralogie) nl:Anhedrisch nds:Xenomorph pl:Ksenomorfizm uk:Ксеноморфізм