| 词汇 | silurian |
| 释义 | Silurian adjective geology specializeduk /saɪˈlʊə.ri.ən/ us /sɪˈlʊr.i.ən/ from or referring to the period of time between about 445 and 420 million years ago, in which fish with jaws (= mouth bones) and some plants and small animals on land first appeared: 志留纪的（迄今约4亿4500万至4亿2000万年前的地质时间段，此时期有颌骨的鱼类以及陆地上的植物和小型动物第一次出现） The grey slates and shales of the Silurian rock are obvious as you walk. the Silurian period志留纪 The underlying Siktefjellet Group is likely to be Late Silurian in age, although there is no direct fossil evidence of this. It has a very local feel with its sandstone dressings, and is rendered in rough cast, a common practice in areas like this where the Silurian stone was weak. Many of these had at one time been volcanoes, the lava from which had flowed over and covered the Silurian formation in which the gold bearing quartz was found. Geology - general words aeolian Anthropocene anticline apophysis auriferous biozone carboniferous continental plate geologically geomorphic gully erosion henge Holocene Permian petrographic petrographically petrography petrological Precambrian rockfall You can also find related words, phrases, and synonyms in the topics: Prehistory Specific periods of time Silurian noun[ S ] uk /saɪˈlʊə.ri.ən/ us /sɪˈlʊr.i.ən/ the Silurian the period of time between about 445 and 420 million years ago, in which fish with jaws (= mouth bones) and some plants and small animals on land first appeared: marble-like fossil corals, dating from the Silurian Very recently, discoveries of some new and very well-preserved thelodonts from the Silurian of British Columbia were announced. Currently, biostratigraphic intervals averaging 500 000 million years are routinely recognized in the Silurian. Within a few years he had defined and classified three important periods of geological development, the Silurian, Devonian and Permian. By the late Silurian, colonization of the changing land with its newly emerging continents was well under way. Geology - general words aeolian Anthropocene anticline apophysis auriferous biozone carboniferous continental plate geologically geomorphic gully erosion henge Holocene Permian petrographic petrographically petrography petrological Precambrian rockfall You can also find related words, phrases, and synonyms in the topics: Prehistory Specific periods of time |
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