28°43′12″N 109°57′53″E / 28.7200°N 109.9647°E / 28.7200; 109.9647The Guzhangian is an uppermost stage of the Miaolingian Series of the Cambrian. It follows the Drumian Stage and ...
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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.
The name Guzhangian is derived from Guzhang County, Hunan Province, China.