干旱区生态环境知识资源中心(Arid): Cenomanian oyster communities from a tide-dominated epeiric ramp in the southern Tethys: A sediment-fauna relationship

Arid

DOI	10.1016/j.jafrearsci.2021.104306
	Cenomanian oyster communities from a tide-dominated epeiric ramp in the southern Tethys: A sediment-fauna relationship
	Abdelhady, Ahmed A.; Mohamed, Omar; Hassan, Alzahraa A. A.; Mohamed, Ramadan M. S.
通讯作者	Abdelhady, AA (corresponding author), Minia Univ, Fac Sci, Geol Dept, El Minia 61519, Egypt.
来源期刊	JOURNAL OF AFRICAN EARTH SCIENCES
ISSN	1464-343X
EISSN	1879-1956
出版年	2021
卷号	184
英文摘要	The Cenomanian shallow marine succession in the Southern Galala Plateau of Egypt contains rich benthic fauna and preserves enormous information on how paleo-communities respond to fluctuating environmental conditions. Based on rock and fossil data, the Galala Formation was interpreted to be the result of deposition on a tidedominated homoclinal ramp. Three main facies associations representing three depositional environments (intertidal, shallow subtidal, and deep subtidal) were recognized. Three distinct macroinvertebrate associations corresponding to these environments and dominated mainly by oysters were quantitatively identified. They show a gradational vertical increase in diversity as well as in the infaunal and mobile species. This trend can be attributed to the Cenomanian sea-level rise, where harsh marginal marine environments in the middle Cenomanian became more stable toward the latest Cenomanian. Sea flooding may have eliminated barriers, enhanced water circulation, and stopped hyperpycnal flow and/or terrigenous flux. Consequently, oxic mesotrophic conditions may have prevailed and siliciclastic starvation may have concentrated fossil materials, and therefore, diversity increased. Based on the vertical and lateral changes of the facies stacking pattern, two main parasequence types were recognized, the first includes deep subtidal deposits changed upwards to shallow subtidal and the second includes shallow subtidal deposits that pass upward into intertidal. Moreover, two and one-half third-order mixed sequences were identified and correlated to their regional and global counterparts.
英文关键词	Benthic invertebrates Palaeoecology Depositional environments Galala Formation Southern Tethys Upper Cretaceous
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000697117800001
WOS关键词	NORTH EASTERN DESERT ; SEQUENCE STRATIGRAPHY ; GEBEL MAGHARA ; BENTHIC ASSOCIATIONS ; GALALA FORMATION ; WESTERN SIDE ; RIFT-BASIN ; SUEZ RIFT ; SUCCESSION ; MARINE
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363711
作者单位	[Abdelhady, Ahmed A.; Mohamed, Omar; Hassan, Alzahraa A. A.; Mohamed, Ramadan M. S.] Minia Univ, Fac Sci, Geol Dept, El Minia 61519, Egypt
推荐引用方式 GB/T 7714	Abdelhady, Ahmed A.,Mohamed, Omar,Hassan, Alzahraa A. A.,et al. Cenomanian oyster communities from a tide-dominated epeiric ramp in the southern Tethys: A sediment-fauna relationship[J],2021,184.
APA	Abdelhady, Ahmed A.,Mohamed, Omar,Hassan, Alzahraa A. A.,&Mohamed, Ramadan M. S..(2021).Cenomanian oyster communities from a tide-dominated epeiric ramp in the southern Tethys: A sediment-fauna relationship.JOURNAL OF AFRICAN EARTH SCIENCES,184.
MLA	Abdelhady, Ahmed A.,et al."Cenomanian oyster communities from a tide-dominated epeiric ramp in the southern Tethys: A sediment-fauna relationship".JOURNAL OF AFRICAN EARTH SCIENCES 184(2021).