petrogenyn.
/pᵻˈtrɒdʒᵻni/, /pᵻˈtrɒdʒn̩i/, U.S. /pəˈtrɑdʒəni/ Geology.
= petrogenesis n. Frequently in petrogeny's residua system, a liquid system consisting of the molten oxides of aluminium, sodium, potassium, and silicon which are the chief components of igneous rocks.
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the world > the earth > earth sciences > geology > [noun] > petrology or petrography > petrogeny
petrogenesis1886
lithogeny1888
petrogeny1888
lithogenesis1909
the world > the earth > structure of the earth > formation of features > formation of rock or stone > [noun]
petrifaction?a1425
petrification1611
lapidification1626
lapidescence1649
petrescency1662
petrifying1712
petrescence?1797
lithification1872
petrogenesis1886
lithogeny1888
lithifaction1893
lithogenesis1909
petrogeny1937
1888 J. J. H. Teall Brit. Petrogr. Gloss. 448 Petrogeny, that department of geology which treats of the formation of rocks.
1937 N. L. Bowen in Amer. Jrnl. Sci. 233 1 In mixtures containing all of these (SiO2, Al2O3, iron oxide, CaO, MgO, Na2O and K2O) the residual liquid from fractional crystallization will show this same character of great enrichment in alkali-alumina silicate. Since the oxides listed above make up some 97 per cent of the composition of the average igneous rock the alkali-alumina silicate system (NaAlSiO4–KAlSiO4–SiO2) is here referred to as petrogeny's ‘residua system’.
1950 E. E. Wahlstrom Introd. Theoret. Igneous Petrol. i. 3 Petrogeny places emphasis on the manner of origin or genesis of rocks.
1990 Geol. Soc. Amer. 22 17 Historic igneous petrogeny viewed from the southern Cordillera.
1999 Lithos 46 722/1 Information on the conditions of melts during leucite crystallisation arise [sic] from a plot of all the samples in the system NaAlSiO4–KAlSiO4–SiO2–H2O (or petrogeny's residua system) at variable water fugacities.
This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).
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n.1888