Guzhangian

Cambrian graphical timeline

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Orsten Fauna

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Kaili biota

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Archaeocyatha extinction

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Sirius Passet biota

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Chengjiang biota

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First halkieriids, mollusсs, hyoliths SSF

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Baykonurian glaciation

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Dresbachian extinction

Major Glacial period

Subdivision of the Cambrian according to the ICS, as of 2024.^[1]
Vertical axis scale: Millions of years ago

28°43′12″N 109°57′53″E / 28.7200°N 109.9647°E / 28.7200; 109.9647 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.^[2]

The name Guzhangian is derived from Guzhang County in Hunan Province of China.

The GSSP is defined in the Huaqiao Formation in Hunan, China.^[3] The precise base of the Guzhangian is a limestone layer 121.3 m above the base Huaqiao Formation at the Louyixi section (28°43′12″N 109°57′53″E / 28.7200°N 109.9647°E / 28.7200; 109.9647), where Lejopyge laevigata has its first appearance.^[2]

Palaeontology

Chancelloria

Arthropods

Arthropods of the Guzhangian
Taxa	Presence	Location	Description	Images
Leanchoilia	"Stage 3"-Guzhangian	Burgess Shale, British Columbia, Canada; Yuanshan Formation, Chengjiang biota, China
Sidneyia	"Stage 5"-Guzhangian	Phyllopod Bed, Burgess Shale

Dinocarididans

Dinocarididans of the Guzhangian
Taxa	Presence	Location	Description	Images
Opabinia	"Stage 5"-Guzhangian	Burgess Shale
Peytoia	Fortunian-Guzhangian	Phyllopod bed, Walcott Quarry, Burgess Shale, British Columbia, Canada; Koscierzyna borehole, Kashubia, Poland

References

^ "International Chronostratigraphic Chart" (PDF). International Commission on Stratigraphy. December 2024. Retrieved January 2, 2025.
^ ^a ^b "GSSP for Guzhangian Stage". Retrieved 12 November 2012.
^ Peng, Shanchi; Loren E. Babcok; Jingxun Zuo; Huanling LIn; Xuejian Zhu; Xianfeng Yang; Richard A. Ribosn; Yuping Qui; Gabriella Bagnoli; Yong'an Chen (2009). "The Global Boundary Stratotype Section and Point (GSSP) of the Guzhangian Stage (Cambrian) in the Wuling Mountains, Northwestern Hunan, China" (PDF). Episodes. 32 (1): 41–55. Retrieved 14 September 2012.

Preceded by the Proterozoic Eon	Phanerozoic Eon
	Paleozoic Era						Mesozoic Era			Cenozoic Era
	Cambrian	Ordovician	Silurian	Devonian	Carboniferous	Permian	Triassic	Jurassic	Cretaceous	Paleogene	Neogene	4ry

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[ICS-1] "International Chronostratigraphic Chart" (PDF). International Commission on Stratigraphy. December 2024. Retrieved January 2, 2025.

[GSSP_for_Guzhangian_Stage-2] "GSSP for Guzhangian Stage". Retrieved 12 November 2012.

[Peng_2009-3] Peng, Shanchi; Loren E. Babcok; Jingxun Zuo; Huanling LIn; Xuejian Zhu; Xianfeng Yang; Richard A. Ribosn; Yuping Qui; Gabriella Bagnoli; Yong'an Chen (2009). "The Global Boundary Stratotype Section and Point (GSSP) of the Guzhangian Stage (Cambrian) in the Wuling Mountains, Northwestern Hunan, China" (PDF). Episodes. 32 (1): 41–55. Retrieved 14 September 2012.

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