- 查看更多前往 Wikipedia 查看全部内容
Precambrian - Wikipedia
The Precambrian is an informal unit of geologic time, [3] subdivided into three eons (Hadean, Archean, Proterozoic) of the geologic time scale. It spans from the formation of Earth about 4.6 billion years ago ( Ga ) to the beginning of the Cambrian Period, about 538.8 million years ago ( Ma ), when hard-shelled creatures first … 展开
The Precambrian is the earliest part of Earth's history, set before the current Phanerozoic Eon. The Precambrian is so named because it preceded the Cambrian, the first period of … 展开
Relatively little is known about the Precambrian, despite it making up roughly seven-eighths of the Earth's history, and what is known has largely been discovered from the 1960s onwards. The Precambrian fossil record is poorer than that of the succeeding 展开
Evidence of the details of plate motions and other tectonic activity in the Precambrian is difficult to interpret. It is generally believed that … 展开
A terminology has evolved covering the early years of the Earth's existence, as radiometric dating has allowed absolute dates to be assigned to … 展开
• Phanerozoic – Fourth and current eon of the geological timescale 展开
CC-BY-SA 许可证中的维基百科文本 Plate Tectonics, Precambrian - SpringerLink
Building cratonic keels in Precambrian plate tectonics
2020年10月14日 · We demonstrate that after Archaean plate tectonics began, the hot, ductile, positively buoyant, melt-depleted sublithospheric mantle layer located under subducting oceanic plates was unable to ...
The Precambrian continental record: A window into early Earth ...
The progressive onset and evolution of Precambrian ... - Springer
Precambrian | Life, Climate, & Facts | Britannica
The Precambrian encompasses the Archean and Proterozoic eons, which are formal geologic intervals that lasted from 4 billion to about 541 million years ago, and the Hadean Eon, which is an informal interval spanning from 4.6 billion to …
Early Precambrian Plate Tectonics | SpringerLink
Precambrian tectonic evolution of Earth: an outline
Precambrian Perspectives | Science - AAAS