单词 | psephitic |
释义 | psephiticadj. Geology. Of, relating to, or of the nature of a psephite. ΚΠ 1879 F. Rutley Study of Rocks xiv. 299 The clastic rocks, which he divides into the psephitic (from ψῆϕος, a small stone); the psammitic, and the pelitic. 1921 G. W. Tyrrell in Geol. Mag. 58 501 The adjective psephitic usefully describes the metamorphic rocks derived from the metamorphism of conglomerates, etc. 1989 Sedimentary Geol. 63 93 Repeated changes..are evidenced by heavy mineral spectra and psephitic clast modes of the Devonian–Carboniferous formations. 1997 Tectonophysics 276 321/1 For these deposits, considerable difference of thickness and composition of rocks from one section to another, as well as the presence of the psephitic conglomerates are characteristic. This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022). < adj.1879 |
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