| 词汇 | bioclastic |
| 释义 | bioclastic adjective geology specializeduk /ˌbaɪ.əʊˈklæs.tɪk/ us /ˌbaɪ.oʊˈklæs.tɪk/ used to refer to a type of rock consisting of very small pieces of animals and plants生物碎屑的 Geology: types of rock agglomerate arenaceous arenite asthenosphere asthenospheric emery flinty gneiss intrusive lahar limestone lodestone magma marcasite marl marmoreal mudstone obsidian sandstone schist bioclastic | American Dictionarybioclastic adjective[ not gradable ] us/ˌbɑɪ·oʊˈklæs·tɪk/ earth science describes a type of rock consisting of very small pieces of animals and plants Examples of bioclasticbioclastic The intercalated marls are thinner and contain similar coarse bioclastic material. This facies consists of tabular beds (up to 0.5 m thick), with occasional planar cross-bedding and frequent centimetre-thick bioclastic tempestites (mainly formed by lituolids). The presence of centimetre-thick bioclastic graded levels with quartz silt (tempestites) indicates the existence of density flows induced by storms. The formation also contains thin layers of calcareous sandstone, bioclastic, argillaceous and silty limestone, as well as calcareous sandstone. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Locally there are interbedded thinly bedded lenticular bioclastic limestone and dolomitic beds which are 0.15m thick with siltstone, sandstone and rare tuff beds. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. Bioclastic phosphates can also be cemented by phosphate minerals. From Wikipedia This example is from Wikipedia and may be reused under a CC BY-SA license. After the initial deposition of bioclastic rudist-bearing limestones and the formation of some reef complexes composed of rudists and single corals, the sea level started dropping. 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. |
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