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单词 Guzhangian
释义

Guzhangian

英语百科

Guzhangian

Key events in the Cambrian
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Ordovician
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Fortunian
"Stage 2"
"Stage 3"
"Stage 4"
"Stage 5"
Drumian
Guzhangian
Paibian
Jiangshanian
"Stage 10"
 
 
 
 
* * * * * * * * * * * *
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Baykonur
glaciation
Baykonur
glaciation
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Orsten Fauna
Burgess Shale
Kaili biota
Archaeocyatha extinction
Emu Bay Shale
Sirius Passet biota
Chengjiang biota
First Trilobites
SSF diversification, first brachiopods & archaeocyatha
First halkieriids, mollusсs, hyoliths SSF
Treptichnus pedum trace
Large negative peak δ 13Ccarb excursion
First Cloudina & Namacalathus mineral tubular fossils
Stratigraphic scale of the ICS subdivisions and Precambrian/Cambrian boundary.

The Guzhangian is an uppermost stage of the 3rd series of the Cambrian. It follows the Drumian stage and precedes the Paibian stage of the Furongian series. The base is defined as the first appearance of the trilobite Lejopyge laevigata around ~500.5 million years ago. The Guzhangian-Paibian boundary is marked by the first appearance of the trilobite Glyptagnostus reticulatus around ~497 million years ago.

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更新时间:2025/6/22 22:31:12