| 词汇 | lava |
| 释义 | lava noun[ U ] uk /ˈlɑː.və/ us /ˈlɑː.və/ hot liquid rock that comes out of the earth through a volcano, or the solid rock formed when it cools: （火山喷出的）岩浆，熔岩;火山岩 molten lava融化的熔岩 Photo by Cathy Scola/Moment Open/GettyImages Geology: earthquakes & volcanic eruptions aftershock crater fault line geyser lahar magma non-volcanic phreatic pyroclastic quake seismically seismograph shock wave tectonically temblor the Richter scale tremor volcanic volcano vulcanicity You can also find related words, phrases, and synonyms in the topics: Geology: types of rock lava | American Dictionarylava noun[ U ] us/ˈlɑv·ə, ˈlæv·ə/ earth science hot liquid rock that comes out of a volcano, or the solid rock formed when liquid rock cools Examples of lavalava There have been reports of some localised fumarole activity during the past 100 years, and a new lava flow broke out only 20 years ago. For lava, the dome is unlikely to be vertically isothermal because the diffusivity is small. Geologically, the only reasonable conclusion is that the lavas were erupted subaerially, or perhaps emplaced as sills close to the surface in some cases. The writer merges memory with botanical and geological discoveries and investigation, family lore with descriptions of lava flows, poetry and the narrative essay. These conglomerates are composed of clasts of basalt, volcaniclastic sandstone, alkaline lava and sub-rounded chert. Given the relative efficiency of convection compared to conduction, this stage would probably be short compared with the time it takes the lava to freeze. It is important to note that our model assumes that the lava was erupted in an isothermal state at its melting temperature. And where would we place fire and smoke, not to mention liquids of all kinds from ink to volcanic lava? To the east of the laguna the lavas contain angular xenoliths of more basic lava, while to the west they appear massive and lack xenoliths. Several previous studies of lava domes have chosen a more practical route and conducted laboratory experiments with analogue fluids. Stratigraphic relationships between lava flows for different zones are shown in inset table. Subsequent lavas were less voluminous, with higher silica content and lower effusion rate, forming multiple flows. The latter consist mainly of basaltic pillowed and massif lava flows. Pyroclastic products are widespread and include lapilli tuff, lithic tuff, agglomerate and pyroclastic breccia; compositionally similar lava flows are massive or blocky. The breccia contains a variety of boulders, dominated by vesicular basalt and phonolitic lavas. 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. Collocations withlavalavaThese are words often used in combination with lava. Click on a collocation to see more examples of it. basaltic lava Kolbeinsey consists of basaltic lava with very many cracks and vesicles. basalt lava Each cycle began with flank fissure eruptions of alkali basalt lava, followed by minor eruptions of basanite to phonotephrite lavas. lava bed This involved five-mile long stretches of lavabed which was very destructive of the cars. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. 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. See all collocations with lava |
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