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siliciclastic
siliciclastic adj.
Brit. 
/ˌsɪlᵻsᵻˈklastɪk/
, /ˌsɪlᵻsᵻˈklastɪk/U.S. /ˌsɪləsəˈklæstɪk/
Geology applied to clastic rocks and deposits that are not carbonates./ˌsɪləsəˈklæstɪk/ΘΚΠ
the world > the earth > structure of the earth > constituent materials > rock > composite rock > [adjective] > fragmentary
fragmentary1832
pyroclastic1862
clastic1877
fragmental1882
cataclastic1887
autoclastic1891
siliciclastic1961
volcaniclastic1961
1961 J. Braunstein in Bull. Amer. Assoc. Petroleum Geologists XLV. 2017/2 I dare to submit two new terms... These are, ‘calciclastic’.., referring to clastic carbonate rocks, and, ‘siliciclastic’.., referring to clastic non-carbonate rocks (which are almost exclusively silicon-bearing, either as forms of quartz or as silicates).
1976 Nature 3 June 440/1 Two major subdivisions are considered—the siliciclastic and carbonate tidal deposits. Recent siliciclastic examples include the classic tidal flats of the North Sea, [etc.].
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