摘要
The evolution of the earth is marked by development of more than 70% of the present day continents during Archean. The Archean - Proterozoic boundary is characterized by continental amalgamation, and subsequent breaking and development of worldwide glaciations. The Paleoproterozoic time is characterized by change in atmospheric oxygen and intense biogenic activity during the early part, and amal- gamation of the continents to form the supercontinent ＂Columbia＂, development of sulphidic ocean chemistry and disappearance of major BIF deposit formation towards the later part.
The evolution of the earth is marked by development of more than 70% of the present day continents during Archean. The Archean - Proterozoic boundary is characterized by continental amalgamation, and subsequent breaking and development of worldwide glaciations. The Paleoproterozoic time is characterized by change in atmospheric oxygen and intense biogenic activity during the early part, and amal- gamation of the continents to form the supercontinent ＂Columbia＂, development of sulphidic ocean chemistry and disappearance of major BIF deposit formation towards the later part.
