English translation for "proterozoic eon"

元古宙

Related Translations:

proterozoic:  n.,adj.【地质学；地理学】元古代[元古界](的)。

proterozoic era:  元古代

proterozoic group:  元古界原生界

proterozoic stratum:  元古代层

eon:  n.无限长的时代，永世 (＝aeon)。

eons:  万古

auspiciopus eon:  贤劫

cryptozoic eons:  隐生宙

cryptozoic eon:  隐生超代隐生宙

phanerozoic eons:  显生代显生宙

Example Sentences:

1.

Global ice ages occurred at least three times in the period known as the proterozoic eon , first at 2 . 3 billion years ago and again at 750 million and 600 million years ago 原生代期间至少发生过三次全球性冰期，第一次始于23亿年前，其后于7 . 5亿与6亿年前又再度发生。

Similar Words：

"proterosoma" English translation, "proterosuchia" English translation, "proterosuchidae" English translation, "proterosuchus" English translation, "proterozoic" English translation, "proterozoic era" English translation, "proterozoic group" English translation, "proterozoic stratum" English translation, "protesilaus" English translation, "protesin" English translation