{"title":"Palynological dating of the Lamja Sandstone (Benue Basin, Nigeria) and its geological significance","authors":"M. OláníyìOdébòdé","doi":"10.1016/0899-5362(87)90085-6","DOIUrl":null,"url":null,"abstract":"<div><p>The Lamja Sandstone of the Upper Benue Basin, northeastern Nigeria, is dated Coniacian on the basis of a fossil microfloral assemblage. The assemblage is constituted by <em>Droseridites senonicus, Cretacaeiporites scabratus, Ephedripites costaliferous, E. multicostatus, Gleichenidites senonicus, Tricolpopollenites retiformis, Triorites africaensis</em> and ? <em>Steevesipollenites binodosus</em>. The dating eliminates the uncertainty that has hitherto plagued the formation's precise age and indicates that the sandstone is in part laterally equivalent to the underlying Sukuliye and Numanha Formations. This study also confirms the hypothesis that the folded Lamja Sandstone was partly deposited by a regressing sea.</p></div>","PeriodicalId":100749,"journal":{"name":"Journal of African Earth Sciences (1983)","volume":"6 4","pages":"Pages 421-426"},"PeriodicalIF":0.0000,"publicationDate":"1987-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0899-5362(87)90085-6","citationCount":"10","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of African Earth Sciences (1983)","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0899536287900856","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 10
Abstract
The Lamja Sandstone of the Upper Benue Basin, northeastern Nigeria, is dated Coniacian on the basis of a fossil microfloral assemblage. The assemblage is constituted by Droseridites senonicus, Cretacaeiporites scabratus, Ephedripites costaliferous, E. multicostatus, Gleichenidites senonicus, Tricolpopollenites retiformis, Triorites africaensis and ? Steevesipollenites binodosus. The dating eliminates the uncertainty that has hitherto plagued the formation's precise age and indicates that the sandstone is in part laterally equivalent to the underlying Sukuliye and Numanha Formations. This study also confirms the hypothesis that the folded Lamja Sandstone was partly deposited by a regressing sea.
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