Arid
DOI10.1016/j.palaeo.2017.12.021
Termite nests, rhizoliths and pedotypes of the Oligocene fluviomarine rock sequence in northern Egypt: Proxies for Tethyan tropical palaeoclimates
Badawy, Hanan S.
通讯作者Badawy, Hanan S.
来源期刊PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
EISSN1872-616X
出版年2018
卷号492页码:161-176
英文摘要

The present study gives an account of the development of several associations of the continental trace fossils within a particular type of palaeosols on the Oligocene fluviomarine rock sequence that is equivalent to the Jebel Qatrani Formation and their palaeoclimatic and palaeoenvironmental implications in the northern Western Desert of Egypt. This study made use of field observations, binocular and polarizing microscopy investigation of isotropism and anisotropism of the materials and the birefringence fabric of the finest materials. Also, the study carried out scanning electron microscopy investigation and X-ray diffraction analysis of termite nests, rhizoliths and palaeosols. The present contribution recognises four pedotypes represented by Oxisols, Aridisols, Entisols and Spodosols based on the macro- and micromorphologic attributes, mineralogy and by comparison with extant soils. The four pedotypes bear similar types of rhizoliths and termite nests, but with variable abundance and depths of emplacement. The pedogenic features associated with the studied continental trace fossils overprint the marine trace fossils and the sedimentary facies of the studied fluviomarine rock sequence. The features of the developed associations reveal that during the Oligocene, the northern Western Desert terrain of Egypt was closely similar to the Fayum Depression where the lowland coastal plain was characterised by wet soil and seasonal rainfall. The developed associations on the coastal plain represent in situ proxies for the palaeoclimatic setting under which they were formed. Their attributes indicate that tropical wet-dry conditions with the fluctuating moisture regime were prevalent during the deposition of the studied rock sequence.


英文关键词Pedogenesis Continental ichnofossils Jebel Qatrani Fayum Palaeosols
类型Article
语种英语
国家Egypt
收录类别SCI-E
WOS记录号WOS:000425072800013
WOS关键词PEDOGENIC PROCESSES ; PALEOSOL SEQUENCES ; QATRANI FORMATION ; BASIN ; MORPHOLOGY ; USA ; ICHNOFOSSILS ; TERRESTRIAL ; DEPOSITS ; SOILS
WOS类目Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向Physical Geography ; Geology ; Paleontology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/211951
作者单位Beni Suef Univ, Fac Sci, Geol Dept, Bani Suwayf, Egypt
推荐引用方式
GB/T 7714
Badawy, Hanan S.. Termite nests, rhizoliths and pedotypes of the Oligocene fluviomarine rock sequence in northern Egypt: Proxies for Tethyan tropical palaeoclimates[J],2018,492:161-176.
APA Badawy, Hanan S..(2018).Termite nests, rhizoliths and pedotypes of the Oligocene fluviomarine rock sequence in northern Egypt: Proxies for Tethyan tropical palaeoclimates.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,492,161-176.
MLA Badawy, Hanan S.."Termite nests, rhizoliths and pedotypes of the Oligocene fluviomarine rock sequence in northern Egypt: Proxies for Tethyan tropical palaeoclimates".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 492(2018):161-176.
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