黔北桐梓松坎志留系石牛欄組的后生動物礁
[Abstract]:The ShiNiulan member of the late Shiniulan formation in Tongzi Silurian, northern Guizhou Province, is dominated by crustal limestone, which is distributed in the shallow water area of the surface sea north of the central Guizhou Paleocontinent. In the upper part of ShiNiulan section of Tongzi Songhan Hanjiadian section, the epizoan reef facies unit is exposed, the thin layer limestone reef wing subfacies is covered with no bedding, and the biolimestone gravel block without sorting belongs to the collapse rock subfacies. It can be inferred that the growth of the unexposed point reef has reached the stage of obvious forward geomorphologic uplift, and the reef coral or the consolidated reef limestone in the core of the reef has been transported to the surrounding reef body after being broken under the action of strong current. A layered reef is overlaid over the sloughing rock. During the whole process of reef growth, the coral framework is the main body of the bound rock, and the biodiversity and abundance of the reef animals and the reef-attached animals are high. The ecological community differentiation of this reef formation period is closely related to the distance from the coastline of the central Guizhou ancient land. The Daijiagou area in the southern region belongs to the near-shore stromatolite growth zone, and Hanjiadian is the southern margin of the metazoan shelf type reef distribution. The point reef distributes northward and ends at the dam pond. The rise of Tongzi resulted in the exposure of the regional seabed and the end of reef growth.
【作者單位】: 貴州省地質(zhì)調(diào)查院;中國科學(xué)院南海海洋研究所;中國科學(xué)院南京地質(zhì)古生物研究所中國科學(xué)院資源地層學(xué)與古地理學(xué)重點實驗室;
【基金】:中國科學(xué)院戰(zhàn)略性先導(dǎo)科技專項(B類,子課題XDB10010503) 國家自然科學(xué)基金(41372022) 國家基金委創(chuàng)新研究群體項目(41290260) 貴州省科技廳重大科技專項(黔科合重大專項字[2014]6003號) 貴州省地礦局青年科研項目(黔地礦科合[2012]16號)資助
【分類號】:P534.43
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