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单词 volcaniclastic
释义

volcaniclasticadj.n.

Brit. /vɒlˌkanᵻˈklastɪk/, U.S. /vɔlˌkænəˈklæstɪk/, /vɑlˌkænəˈklæstɪk/
Forms:

α. 1900s– volcaniclastic.

β. 1900s– volcanoclastic.

Origin: Formed within English, by blending. Etymons: volcanic adj., clastic adj.
Etymology: Blend of volcanic adj. and clastic adj. (compare quot. 1961); compare -clastic comb. form.With β. forms compare volcano- comb. form.
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).
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adj.n.1961
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