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The world’s oldest-known bryozoan reefs: Late Tremadocian, mid-Early Ordovician; Yichang, Central China
Cuffey, R.J.; Chuantao, X.; Zhu, Z.; Spjeldnaes, N.; Hu, Z.-X. (2013). The world’s oldest-known bryozoan reefs: Late Tremadocian, mid-Early Ordovician; Yichang, Central China, in: Ernst, A. et al. Bryozoan Studies 2010. Lecture Notes in Earth System Sciences, 143: pp. 13-27. http://dx.doi.org/10.1007/978-3-642-16411-8_2
In: Ernst, A.; Schäfer, P.; Scholz, J. (Ed.) (2013). Bryozoan Studies 2010. Lecture Notes in Earth System Sciences, 143. Springer: Berlin. ISBN 978-3-642-16410-1. viii, 463 pp. https://dx.doi.org/10.1007/978-3-642-16411-8, more
In: Lecture Notes in Earth System Sciences. Springer: Heidelberg; Berlin. ISSN 2193-8571; e-ISSN 2193-858X, more
Available in  Authors 
Keywords
    Reefs
    Bryozoa [WoRMS]; Nekhorosheviella; Orbiramus; Trepostomatida † [WoRMS]
    China, People's Rep. [Marine Regions]
    Marine/Coastal
Author keywords
    Bryozoan reefs; Early Ordovician; Yichang; Nekhorosheviella; Orbiramus; Trepostomes
Authors  Top 
  • Cuffey, R.J.
  • Chuantao, X.
  • Zhu, Z.
  • Spjeldnaes, N.
  • Hu, Z.-X.
Abstract
    The world’s earliest-known bryozoan-built reef-mounds are in mid-Lower Ordovician (upper Tremadocian) strata near Yichang, Hubei Province, central China. Their framework, a globstone, was built by abundant rounded zoaria of the trepostome Nekhorosheviella semisphaerica. That framework further baffled micrite immediately around the colonies, more broadly surrounded regionally by bioclastic calcarenites (Fenxiang Formation). Fragments of delicate branching Orbiramus normalis occur rarely in the bryohermal micrite.
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