典型文献
Sedimentology and foraminiferal paleoecology of the exposed Oligocene-Miocene Ogwashi-Asaba Formation in Issele-Uku area,Anambra Basin,southern Nigeria:A paleoenvironmental reconstruction
文献摘要：
Sedimentological and foraminiferal paleoecological studies were carried out for the Oligocene-Miocene Ogwashi-Asaba Formation of the Anambra Basin at the Issele-Uku area in southern Nigeria,to reconstruct paleoenvironments.The pattern of rock successions and textural characteristics suggest the prevalence of fluvio-deltaic setting during the formation of lignites and clastic rocks of Ogwashi-Asaba For-mation.Agglutinated benthic foraminiferal species such as Ammotium sp.,Textularia sp.,Gavelinella sp.,Milliamina sp.,Reophax sp.,Bolivina sp.,Eponides sp.,Pseudobolivina sp.and Lenticulina sp.dominate the shale units whereas the planktonic forms are absent.All these species have very low population and diversity in the shales,which could be due to the presence of harsh conditions such as low oxygen level and scarcity of food,leading to poor survival.The assessments of benthic foraminifera's habitat suggest middle-to-inner neritic marine environment for the shales.Granulometric results suggest fluvial environment for the sand-stone and deltaic for the lignite.The Ogwashi-Asaba Formation in Issele-Uku area of Anambra Basin,southern Nigeria,therefore,have records of shallow marine,and fluvio-deltaic paleoenvironments.
文献关键词：
中图分类号：
作者姓名：
J.A.Adeoye;V.O.Jolayemi;S.O.Akande
作者机构：
Department of Geology and Mining,Ibrahim Badamasi Babangida University,Lapai 911101,Niger State,Nigeria;Department of Geology and Mineral Sciences,University of Ilorin,Ilorin 240101,Kwara State,Nigeria
文献出处：
引用格式：
[1]J.A.Adeoye;V.O.Jolayemi;S.O.Akande-.Sedimentology and foraminiferal paleoecology of the exposed Oligocene-Miocene Ogwashi-Asaba Formation in Issele-Uku area,Anambra Basin,southern Nigeria:A paleoenvironmental reconstruction)[J].古地理学报（英文版）,2022(04):618-628
A类：
paleoecology,Ogwashi,Asaba,Issele,Uku,Anambra,Sedimentological,paleoecological,paleoenvironments,fluvio,deltaic,lignites,Agglutinated,Ammotium,Textularia,Gavelinella,Milliamina,Reophax,Bolivina,Eponides,Pseudobolivina,Lenticulina,Granulometric
B类：
Sedimentology,foraminiferal,exposed,Oligocene,Miocene,Formation,area,Basin,southern,Nigeria,paleoenvironmental,reconstruction,studies,were,carried,pattern,successions,textural,characteristics,suggest,prevalence,setting,during,formation,clastic,rocks,benthic,species,such,dominate,units,whereas,planktonic,forms,absent,All,these,have,very,population,diversity,shales,which,could,due,presence,harsh,conditions,oxygen,level,scarcity,food,leading,poor,survival,assessments,habitat,middle,inner,neritic,marine,results,fluvial,sand,stone,therefore,records,shallow
AB值：
0.335474
相似文献
机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
