单词 | volcaniclastic |
释义 | volcaniclastic, a. and n. Geol.|vɒlˌkænɪˈklæstɪk| Also ˌvolcano-. [Blend of volcanic a. (and n.) and clastic a.] A. adj. Both volcanic and clastic. B. n. A volcaniclastic rock.
1961R. V. Fisher in Bull. Geol. Soc. Amer. LXXII. 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. 1972F. J. Pettijohn et al. Sand & Sandstone vii. 261 The erosional volcaniclastics are comparable—in sedimentary structures, geometry, and thickness—to other terrigenous sandstones. 1975Nature 17 Apr. 581/2 The rock types include..a variety of reworked volcanic ashes, volcaniclastic and fluviatile sediments. 1980Ibid. 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. |

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