pyrometamorphismn.
/ˌpʌɪrəʊmɛtəˈmɔːfɪz(ə)m/, U.S. /ˈˌpaɪroʊˌmɛdəˈmɔrˌfɪz(ə)m/ Geology.
Metamorphism of rock caused solely by extreme heat, esp. that resulting from contact of the rock with magma.
ΚΠ
1862 S. Haughton in Jrnl. Geol. Soc. Dublin 9 335 The metamorphism of rocks might thus be assumed to be twofold: Hydrometamorphism..; and Pyrometamorphism, by which rocks originally stratified..come to be subsequently acted on by heat, and so transformed into what are commonly called the metamorphic rocks.
1932 W. B. Scott Introd. Geol. (ed. 3) I. xxii. 505 Igneous metamorphism (or pyrometamorphism) is the effect of intruding magma on the country rock and is practically the same as the contact class.
1969 Jrnl. Petrol. 10 20 (title) Pyrometamorphism of phyllites by a dolerite plug.
2004 Lithos 81 256/2 Rocks similar to buchites have been reported as products of pyrometamorphism in sintering of ceramics.
Derivatives
ˌpyrometaˈmorphic adj. of, relating to, or characterized by pyrometamorphism.
ΚΠ
1879 F. Rutley Study of Rocks xii. 208 Commonly called metamorphic action, but which might more properly be designated pyro~metamorphic action.
1909 F. P. Mennell Introd. Petrol. xix. 152 It is usual to discriminate between dynamo- and pyrometamorphic types.
1999 Jrnl. Volcanology & Geothermal Res. 91 56/1 The diverse pyrometamorphic effects indicate that rocks adjacent to..the subvolcanic conduit were entrained by the same event.
This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022).
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n.1862