See proterozoic.
The most recent part of the Proterozoic, from 1000–542 Ma ago.
http://www.geologypage.com/2014/01/neoproterozoic-era.html Neoproterozoic Era.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。