Please use this identifier to cite or link to this item: http://buratest.brunel.ac.uk/handle/2438/13714
Title: Lower Silurian stromatolites in shallow-marine environments of the South China Block (Guizhou Province, China) and their palaeoenvironmental significance
Authors: Li, Y
Wang, G
Kershaw, S
Yu, S
Ni, C
Keywords: Stromatolite;Shallow marine;Shihniulan Formation;Lower Silurian;North Guizhou;South China Block
Issue Date: 2016
Citation: Palaeogeography, Palaeoclimatology, Palaeoecology, (2016)
Abstract: In northern Guizhou Province (Upper Yangtze Platform, South China Block) two types of reef communities developed in the Lower Silurian (upper Aeronian, Llandovery) Shihniulan Formation; they are calcimicrobial- and metazoan-dominated structures, and existed because of northward deepening of the shallow-marine ramp setting in which they grew. Stromatolitic communities are the focus of the present study and dominated the shallowest reef structures, while metazoan-dominated reefs, previously described in other papers, grew in the outer shelf portion of the ramp. Stromatolitic reefs occur in several sections 23 (Daijiagou, Baishanxi, Jianba and Lianghekou), palaeogeographically close to Qianzhong Land. Within the stromatolite units, laminar sheets of microbial mats and columns are pronounced, with individual stromatolite thicknesses generally less than one meter. Some very small stromatolites are only centimeters in diameter and thickness. Stromatolitic units are cyanobacterial bindstones mostly associated with shales, siltstones and thin-bedded bioclastic limestones. Their growth was frequently punctuated by siliciclastic sediments, and their shallow-water nature is demonstrated by association with birds-eye structures, cross-stratified sediments, and Lingulella-bearing silts in intertidal or/and lagoonal environments. The stromatolites formed during a regression and erosion surfaces are common at the top of the Shihniulan Formation. The Tongzi Uplift, a short-duration expansion of Qianzhong Land, ended the deposition of the late Aeronian limestones.
URI: http://bura.brunel.ac.uk/handle/2438/13714
DOI: http://dx.doi.org/10.1016/j.palaeo.2016.11.001
ISSN: 0031-0182
Appears in Collections:Dept of Life Sciences Research Papers

Files in This Item:
File Description SizeFormat 
Fulltext.pdfFile is embargoed untill 18/11/2018714.82 kBAdobe PDFView/Open    Request a copy


Items in BURA are protected by copyright, with all rights reserved, unless otherwise indicated.