| 词汇 | basaltic |
| 释义 | basaltic adjective uk /bəˈsɔːl.tɪk/ us /bəˈsɑːl.tɪk/ relating to or containing basalt玄武岩的;含玄武岩的 Geology: types of rock agglomerate arenaceous arenite asthenosphere asthenospheric emery flinty gneiss intrusive lahar limestone lodestone magma marcasite marl marmoreal mudstone obsidian sandstone schist The east side of the narrow watercourse was of primitive rock, the west side basaltic. The hills were basaltic, but the creeks having cut through the rocks and excavated the sandstone, the valleys were not of such a fertile character as the plains and ridges. The rocks of this basaltic series occur nowhere except near the coast. We have seen that portions of the basaltic ring, two or three miles in length by one or two miles in breadth, and from one to two thousand feet in height, have been wholly removed. We then entered a basaltic plain, richly grassed and less stony than usual. basaltic | American Dictionarybasaltic adjective[ not gradable ] us/bəˈsɔl·tɪk/ earth science relating to or containing basalt Examples of basalticbasaltic Crustally-contaminated andesites could be produced by combined assimilation and fractional crystallization of basaltic magmas. The role of mantle plumes, particularly in the generation of flood basaltic magmas, has been emphasized by many authors. This is valid also for variations among the basaltic members, implying either a heterogeneous mantle source or varying components of crustal contamination. These movements created thrusts, faults, fractures and basaltic flows in the area. These glasses were formed respectively by over 75 % and 97 % fractional crystallization of basaltic liquid at low pressure. This supports the derivation of andesites from basaltic andesites by fractional crystallization processes. These characteristics suggest that the initiation of sinistral strike-slip movement behind the trench caused the basaltic volcanism subsequent to rifting. The latter consist mainly of basaltic pillowed and massif lava flows. Intra-oceanic arcs are volumetrically dominated by basaltic volcanic products. The majority of these are rhyolitic/dacitic/trondhjemitic and basaltic, commonly hosting massive sulphide deposits of economic importance. The aim is to place constraints on the geochemical evolution of these basaltic magmas. In particular, is the source of within-plate basaltic magmas in an extensional setting the lithosphere, convecting asthenosphere or both? He also suggested that the more acidic varieties were derived from this basaltic melt via fractional crystallization. Generation of sodium-rich magmas from newly underplated basaltic crust. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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