α. 1900s– volcaniclastic.
β. 1900s– volcanoclastic.
单词 | volcaniclastic |
释义 | volcaniclasticadj.n.α. 1900s– volcaniclastic. β. 1900s– volcanoclastic. Geology. A. adj. Designating clastic rocks and deposits which are of volcanic origin. Cf. clastic adj. a, pyroclastic adj. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > composite rock > [adjective] > fragmentary fragmentary1832 pyroclastic1862 clastic1877 fragmental1882 cataclastic1887 autoclastic1891 siliciclastic1961 volcaniclastic1961 the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adjective] > volcanic > volcaniclastic pyroclastic1862 volcaniclastic1961 1961 R. V. Fisher in Bull. Geol. Soc. Amer. 72 1409/1 Only recently..have attempts been made to group all volcanic clastic (termed volcaniclastic in this paper) rocks into a single system... Rocks of pyroclastic origin are only one category of volcaniclastic rocks. 1984 Rep. 27th Internat. Geol. Congr. IV. 483 Intermountain..basins filled with andesitic volcanoclastic rocks decreasing in thickness southwards. 2007 L. A. Spalletti & J. R. Franzese in Z. Gasparini et al. Patagonian Mesozoic Reptiles ii. 35 The most important expression of this was the development of a system of half-grabens infilled by volcaniclastic and pyroclastic deposits. B. n. In plural. Volcaniclastic rocks or deposits. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > composite rock > [noun] > fragmentary pyroclastic1896 tuffite1925 volcaniclastics1970 the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > volcanic rocks > volcaniclastic pyroclastic1896 volcaniclastics1970 1970 Irish Naturalists' Jrnl. 16 373 This is succeeded by a suite of volcanics, predominantly volcaniclastics but with interspersed andesites and dacites. 1980 Nature 29 May 289/2 The Savage Mountain Formation consists of up to 5,000 m of..pillow basalt and massive subaerial flows with associated volcanoclastics. 2005 D. A. V. Stow Sedimentary Rocks in Field iii. 122 (table) Clays..very common alteration products in volcaniclastics. This entry has been updated (OED Third Edition, March 2013; most recently modified version published online December 2021). < adj.n.1961 |
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