| 词汇 | precambrian |
| 释义 | Precambrian adjective geology specializeduk /ˌpriːˈkæm.bri.ən/ us /ˌpriːˈkæm.bri.ən/ from or referring to the earliest period of time, between about 4,600 and 543 million years ago, from when the earth was formed until the first simple forms of life appeared: 前寒武纪的（地质年代的最早阶段，迄今约46-5.43亿年前之间，自地球开始形成起至第一个简单形式的生命出现） Precambrian time前寒武纪时代／时期 Precambrian rocks前寒武纪岩石 The silvery Precambrian quartzite is some of Australia’s oldest exposed rock. The development of the Atlantic began as far back as Precambrian times. It is one of the most comprehensive studies for any Precambrian interval. Precambrian rocks outcrop over vast areas of continental interiors. Geology - general words aeolian Anthropocene anticline apophysis auriferous biozone carboniferous continental plate geologically geomorphic gully erosion henge Holocene Permian petrographic petrographically petrography petrological rockfall syncline You can also find related words, phrases, and synonyms in the topics: Prehistory Specific periods of time Precambrian noun[ S ] geology specializeduk /ˌpriːˈkæm.bri.ən/ us /ˌpriːˈkæm.bri.ən/ the Precambrian the earliest period of time, between about 4,600 and 543 million years ago, from when the earth was formed until the first simple forms of life appeared: It was in the Precambrian when the first single-celled microbes evolved. The museum's Tower of Time referred to the Precambrian as an era. The project will adopt a case-study methodology and will focus on scientific studies of the Precambrian . The Precambrian refers to a stretch of time spanning from the inception of the Earth approximately 4.5 billion years ago to about 540 million years ago. Algae are found in the fossil record dating back to approximately 3 billion years in the Precambrian. Geology - general words aeolian Anthropocene anticline apophysis auriferous biozone carboniferous continental plate geologically geomorphic gully erosion henge Holocene Permian petrographic petrographically petrography petrological rockfall syncline You can also find related words, phrases, and synonyms in the topics: Prehistory Specific periods of time |
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