锥虫相及其多种意义——以印度曼尼普尔中新世博卡比尔组为例

IF 0.5 4区地球科学 Q4 PALEONTOLOGY

Journal of the Palaeontological Society of India Pub Date : 2023-09-21 DOI:10.1177/05529360231181818

Khundom Inaobi, Pradeep Kundal, Mairenbam Chandra Singh, Chabungbam Sharatchand Singh

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引用次数: 0

摘要

在印度曼尼普尔邦唐景山凯旋岱剖面中，发现了保存完好的中新世博卡比尔组生物侵蚀构造。在博卡比勒组两个剖面中记录了代表锥虫鱼相的11种鱼种，即Entobia cateniformis、E. ovula、Gastrochaenolites anauchen、G. cluniformis、G. lapidicus、G. orbicularis、G. ornatus、G. torpedo、Maeandropolydora sulcans、Trypanites solitarius和T. weisei。两种独特的技术组合，以entobia和gastrochaenolite为主。以恩托拜亚岩为主的组合表明后礁或前礁较深的海相条件，而以胃chaenolite为主的组合表明浅海相条件，水下深度为几米，位于后礁泻湖的后礁至斑礁带。

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Trypanites ichnofacies and its multifarious significance: A case study from the Miocene Boka Bil Formation of Manipur, India

Bioerosional structures are well preserved in the Miocene Boka Bil Formation, exposed in the Kaiphundai section, Thangjing Hill Range of Manipur, India. Eleven ichnospecies representing the Trypanites Ichnofacies, viz., Entobia cateniformis, E. ovula, Gastrochaenolites anauchen, G. cluniformis, G. lapidicus, G. orbicularis, G. ornatus, G. torpedo, Maeandropolydora sulcans, Trypanites solitarius and T. weisei, are recorded from the two sections of the Boka Bil Formation. Two distinctive ichnoassemblages, Entobia-dominated and Gastrochaenolites-dominated are recognised. The Entobia-dominated assemblage suggests relatively deeper marine conditions in the deeper part of the back reef or fore reef while the Gastrochaenolites-dominated assemblage points shallower marine conditions, underwater depth of a few metres in the back reef to patch-reef zone of a back-reef lagoon.

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来源期刊

Journal of the Palaeontological Society of India PALEONTOLOGY-

CiteScore

1.10

自引率

16.70%

发文量

期刊介绍： The journal is devoted to the publication of original papers and review articles dealing with all aspects of Paleontology, Paleobotany, Stratigraphy, Geochronology, Anthropology and Pre-history.