Wuliuano

O estágio Wuliuano é o quinto estágio do Cambriano e o primeiro estágio da Série Miaolínguico do Cambriano. Foi formalmente definido pelo ICS em 2018. Sua base é definida pela primeira aparição da espécie de trilobita Oryctocephalus indicus; termina com o início do Estágio Drumiano, marcado pelo primeiro aparecimento da trilobita Ptychagnostus atavus há cerca de 504,5 milhões de anos.

O 'pico de ouro' que define formalmente esse período é encontrado na seção Wuliu-Zengjiayan da formação Kaili, perto da vila Balang nas montanhas Miaoling, Guizhou, na China.

Referências

  1. ^ "Chart/Time Scale". www.stratigraphy.org. International Commission on Stratigraphy.
  2. ^Yuanlong Zhao; Jinliang Yuan; Loren E. Babcock; Qingjun Guo; Jin Peng; Leiming Yin; Xinglian Yang; Shanchi Peng; Chunjiang Wang; Robert R. Gaines; Jorge Esteve; Tongsu Tai; Ruidong Yang; Yue Wang; Haijing Sun; Yuning Yang (June 2019). "Global Standard Stratotype-Section and Point (GSSP) for the conterminous base of the Miaolingian Series and Wuliuan Stage (Cambrian) at Balang, Jianhe, Guizhou, China" (PDF). Episodes. 42: 165–184. Retrieved 8 December 2020.
  3. ^ Yuanlong, Zhao; Jinliang, Yuan; Babcock, Loren; Qingjun, Guo; Jin, Peng; Leiming, Yin; Xinglian, Yang; Chunjiang, Wang; Gaines, Robert; Esteve, Jorge; Ruidong, Yang; Yuning, Yang; Haijing, Sun; Tongsu, Tai. "PROPOSED GLOBAL STANDARD STRATOTYPE-SECTION AND POINT FOR THE BASE OF THE MIAOLINGIAN SERIES AND WULIUAN STAGE （REPLACING PROVISIONAL CAMBRIAN SERIES 3 AND STAGE 5）". International Subcommission on Cretaceous Stratigraphy. International Subcommission on Cambrian Stratigraphy. Retrieved 13 December 2020.
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