Paibian

The Paibian is the lowest stage of Furongian series of the Cambrian. It follows the Guzhangian (3rd series of the Cambrian) and is succeeded by the Jiangshanian stage. The base is defined as the first appearance of the trilobite Glyptagnostus reticulatus around 497 million years ago. The top, or the base of the Jiangshanian is defined as the first appearance of the trilobite Agnostotes orientalis around 494 million years ago.

Paibian
~497 – ~494 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Chronology
Key events in the Cambrian -540 — – -535 — – -530 — – -525 — – -520 — – -515 — – -510 — – -505 — – -500 — – -495 — – -490 — – -485 — – N ♇ P a l e o z o i c Ediacaran C a m b r i a n O T e r r e n e u v i a n S e r i e s 2 M i a o l i n g. F u r o n g. E Fortunian "Stage 2" "Stage 3" "Stage 4" Wuliuan Drumian Guzhangian Paibian Jiangshanian "Stage 10" Tremadocian                 ← 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 ← Baykonurian glaciation ← Dresbachian extinction  Major Glacial period Stratigraphic scale of the ICS subdivisions and Precambrian/Cambrian boundary.
Etymology
Name formality	Formal
Name ratified	2003[1]
Former name(s)	Cambrian Stage 8
Usage information
Celestial body	Earth
Regional usage	Global (ICS)
Time scale(s) used	ICS Time Scale
Definition
Chronological unit	Age
Stratigraphic unit	Stage
First proposed by	Shanchi et. al, 2002[2]
Time span formality	Formal
Lower boundary definition	FAD of the Trilobite Glyptagnostus reticulatus
Lower boundary GSSP	Paibi section, Paibi, Hunan, China 28.3895°N 109.5257°E
GSSP ratified	2003[1]
Upper boundary definition	FAD of the Trilobite Agnostotes orientalis
Upper boundary GSSP	Duibian B Section, Duibian, Zhejiang, China 28.815967°N 118.614933°E
GSSP ratified	2011[3]

The name is derived from Paibi, a village in Hunan, China. The GSSP is defined in the "Paibi section" (Wuling Mountains, Huayuan County), an outcrop of the Huaqiao Formation. The base is the first occurrence of Glyptagnostus reticulatus which is 396 m above the base of the Huaqiao Formation at the type locality (28.3895°N 109.5257°E).[4]

References

1. Peng, S. C.; Babcock, L. E.; Robison, R. A.; Lin, H. L.; Rees, M. N.; Saltzman, M. R. (2004). "Global Standard Stratotype-Section and Point (GSSP) of the Furongian Series and Paibian Stage (Cambrian)". Lethaia. 37 (4): 365–379. doi:10.1080/00241160410002081. Retrieved 8 December 2020.
2. Shanchi, Peng; Babcock, Loren; Robinson, Richard; Huanling, Lin; Rees, Margaret; Saltzman, Matthew. "PROPOSED GLOBAL STANDARD STRATOTYPE-SECTION AND POINT FOR THE PAIBIAN STAGE AND FURONGIAN SERIES (UPPER CAMBRIAN)". International Subcomission on Cambrian Stratigraphy. International Subcomission on Cambrian Stratigraphy. Retrieved 13 December 2020.
3. Peng, Shanchi; Babcock, Loren; Zuo, Jingxun; Lin, Huanling; Yang, Xianfeng; Qi, Yuping; Bagnoli, Gabriella; Wang, Longwu (December 2012). "Global Standard Stratotype-Section and Point (GSSP) for the Base of the Jiangshanian Stage (Cambrian: Furongian) at Duibian, Jiangshan, Zhejiang, Southeast China". Episodes. 35 (4): 462–477. doi:10.18814/epiiugs/2012/v35i4/002. Retrieved 13 December 2020.
4. "GSSP for the Paibian". Archived from the original on 4 March 2016. Retrieved 12 November 2012.