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The Changhsingian Foraminiferal Fauna of the meishan d section, Zhejiang, China, and their Ecostratigraphic Implications

引用

Acta Geologica Sinica(English Edition) 2018年第4期92卷 1299-1323页

作者： KE Xue LUO Liang WEI Yi KOU Xiaohu ZHANG Zongyan HE Weihong Institute of Geological Survey China University of Geosciences China Geological Survey Chengdu Center Safety Engineering College North China Institute of Science & Technology China Geological Survey Wuhan Center School of Earth Sciences China University of Geosciences

Samples were collected continuously and systematically from Beds 2 to 30 of the meishan d section, and nearly 4,000 foraminiferal specimens were recognized. In total, 72 species （partially including undetermined species and conformis species） in 34 genera of foraminifers were identified. Twelve foraminiferal community zones were established from Beds 2 to 27 based on the abundance, dominance, diversity, and equitability of the foraminiferal fauna and a functional morphological analysis of the dominant and characteristic species. The habitat type indicated by each community zone and the sedimentary features were used to determine the paleo-water depths and the relative changes in sea level. We generated curves of both the habitat type and the hydrodynamic conditions, which together indicate the relative changes in the paleo-water depth and the substrate features in the studied area during the Changhsingian. This study discusses the possible relationship between the foraminiferal community zones and the sea-level changes based on a statistical analysis of the foraminiferal community zones.

关键词： foraminifera Habitat type Changhsingian ecostratigraphy meishan d section

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