Mid Cretaceous orbitolinid (Foraminiferida) record from the islands of Cres and Losinj (Croatia) and its regional stratigraphic correlation
Mid Cretaceous orbitolinid (Foraminiferida) record from the islands of Cres and Losinj (Croatia) and its regional stratigraphic correlation
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克罗地亚 Cres 岛和 Losinj 岛的白垩纪中期有孔虫 (Foraminiferida) 记录及其区域地层对比
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
Tvrtko Korbar
中科院分区：
文献类型：
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作者：
A. Husinec;I. Velić;Ladislav Fuček;Igor Vlahović;Dubravko Matičec;Nenad Oštrić;Tvrtko Korbar
摘要克雷斯岛和洛辛吉岛中白垩世浅水石灰岩中含有丰富多样的有孔虫。在此基础上，提出了本区阿普提安、阿尔比安和锡诺马期矿床的生物地层学。已识别出四个Orbitolina生物带：(1)下阿普提统中的Palorbitolina lentiularis Taxon-Range带；(2)下阿尔统中的Orbitolina(Mesorbitolina)Texana组合带，其地层体的特征是一个独特的Orbitolina(Mesorbitolina)Texana，O.(M.)Subacava，O.(m.)Parva和O.(M.)Pervia；(3)上阿尔卑斯基底的‘Valdanchella’derCourt ti Taxon-Range带；以及(4)中-下更新世Orbitolina(Conicorbitolina)Conica丰度带，其中的Orbitolina(Conicorbitolina)Conica物种的丰度显著高于剖面相邻部分的丰度，无论组合或范围如何。Cres和Losinj岛上已建立的生物带与邻近地区的Orbitolinid生物分带和Orbitolinid地层分布相关联，重点是喀斯特迪纳里德。
Abstract The mid Cretaceous shallow-water limestones on the islands of Cres and Losinj contain abundant and diversified orbitolinid foraminifera. A biostratigraphy, based on the orbitolinid taxa and their chronostratigraphic interpretation, is proposed for the Aptian, Albian and Cenomanian deposits in the area investigated. Four orbitolinid biozones have been recognized: (1) Palorbitolina lenticularis Taxon-Range Zone in the Lower Aptian; (2) Orbitolina ( Mesorbitolina ) texana Assemblage Zone in the Lower Albian, the body of strata being characterized by a distinctive assemblage of Orbitolina ( Mesorbitolina ) texana , O. ( M .) subconcava , O . ( M .) parva and O. ( M .) pervia ; (3) ‘Valdanchella’ dercourti Taxon-Range Zone in the basal Upper Albian; and (4) Orbitolina ( Conicorbitolina ) conica Abundance Zone in the Lower–Middle Cenomanian, a body of strata in which the abundance of the species Orbitolina ( Conicorbitolina ) conica is significantly greater than is usual in the adjacent parts of the section, regardless of either association or range. The established biozones on the islands of Cres and Losinj are correlated with orbitolinid biozonations and orbitolinid stratigraphic distributions in the adjacent areas, with emphasis on the Karst Dinarides.