Misplaced Pages

White Sea assemblage

Article snapshot taken from Wikipedia with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.
Ediacaran biotic assemblage
White Sea Assemblage
~560 – ~550 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Kimberella fossil from the Ustʹ Pinega Formation near the White Sea in Russia.
Chronology
−575 —–−570 —–−565 —–−560 —–−555 —–−550 —–−545 —–−540 —–N
e
o
p
r
o
t
e
r
o
z
o
i
cP
ZEdiacaranCambrian    Avalon
AssemblageWhite Sea
AssemblageNama
Assemblage
←Second pulse of the end-Ediacaran extinction
←~Baykonurian glaciation
←First pulse of the end-Ediacaran extinction
←Avalon Explosion
←Shuram excursion reaches its peak
 Major Glacial period
 Shuram excursion
Stratigraphic scale of the ICS subdivisions and Ediacaran biotic assmblages
Vertical axis scale: millions of years ago

The White Sea assemblage was the second of the three Late Ediacaran biotic assemblages, following the Avalon assemblage and preceding the Nama assemblage. It spanned from c. 560 Ma to c. 550 Ma. Showing an increase in genus diversity from the Avalon assemblage, it concluded with a faunal turnover often characterized as the first pulse of the end-Ediacaran extinction, with only 20% of White Sea taxa found in the later Nama assemblage despite similar taphonomic processes.

References

  1. Shen, Bing; Dong, Lin; Xiao, Shuhai; Kowalewski, Michal (4 January 2008). "The Avalon explosion: evolution of Ediacara morphospace". Science. 319 (5859): 81–84. Bibcode:2008Sci...319...81S. doi:10.1126/science.1150279. ISSN 1095-9203. PMID 18174439.
  2. Shi, Wei; Li, Chao; Luo, Genming; Huang, Junhua; Algeo, Thomas J.; Jin, Chengsheng; Zhang, Zihu; Cheng, Meng (24 January 2018). "Sulfur isotope evidence for transient marine-shelf oxidation during the Ediacaran Shuram Excursion". Geology. 46 (3): 267–270. doi:10.1130/G39663.1.
  3. Evans, Scott D.; Tu, Chenyi; Rizzo, Adriana; Surprenant, Rachel L.; Boan, Phillip C.; McCandless, Heather; Marshall, Nathan; Xiao, Shuhai; Droser, Mary L. (15 November 2022). "Environmental drivers of the first major animal extinction across the Ediacaran White Sea-Nama transition". Proceedings of the National Academy of Sciences. 119 (46): e2207475119. Bibcode:2022PNAS..11907475E. doi:10.1073/pnas.2207475119. ISSN 0027-8424. PMC 9674242. PMID 36343248.
  4. Bottjer, David J.; Clapham, Matthew E. (2006). Xiao, Shuhai; Kaufman, Alan J. (eds.). Evolutionary Paleoecology of Ediacaran Benthic Marine Animals. Dordrecht: Springer Netherlands. pp. 91–114. doi:10.1007/1-4020-5202-2_4. ISBN 978-1-4020-5202-6.


Stub icon

This Ediacaran biota-related article is a stub. You can help Misplaced Pages by expanding it.

Categories: