干旱区生态环境知识资源中心(Arid): Palaeoenvironmental analysis of bivalve-dominated concentrations from the lower-middle Miocene succession, Gebel Gharra, Cairo-Suez District, Egypt

Arid

DOI	10.18261/let.57.2.4
	Palaeoenvironmental analysis of bivalve-dominated concentrations from the lower-middle Miocene succession, Gebel Gharra, Cairo-Suez District, Egypt
	Mansour, Heba; Mandor, Mona; El-Sabbagh, Ahmed; El Hedeny, Magdy; Vinn, Olev; Alkahtane, Abdullah; Al Farraj, Saleh; David, Arpad; El-Refaiy, Ahmed; Rashwan, Mohamed
通讯作者	Mansour, H
来源期刊	LETHAIA
ISSN	0024-1164
EISSN	1502-3931
出版年	2024
卷号	57 期号:2
英文摘要	The most conspicuous feature of the lower-middle Miocene deposits of Gebel Gharra, Cairo-Suez District of Egypt, is the presence of three pectinid- and two oyster shell concentrations. They are paucispecific to polyspecific macrobenthic biotopes. Their shells were significantly colonized by abundant endobionts and common epibionts, characterising the Entobia ichnofacies, and representing successive phases of colonization and bioerosion on stable substrates with a low sedimentation rate in high energy, shallow marine environments. Four types of shell concentrations have been distinguished. Pectinid-shell concentration of bed 2 is interpreted as a simple transgressive lag concentration that formed by reworking of previous deposited sediments in a shoal environment. Pectinid-shell concentration of bed 13 represents a coquina of high and moderately convex, sub-horizontally oriented to chaotic, and highly disarticulated and fragmented pectinid valves. It is interpreted as a remnant of previously deposited sediments that have been reworked by a single storm event without major transport of shells, and deposition in a lagoon environment. Pectinid-shell concentration of bed 14b is characterized by completely disarticulated, highly fragmented, moderately to densely packed, and re-oriented pectinid shells. It represents a composite concentration that was originated in a lagoon environment by sporadic high-energy events. Oyster-dominated concentrations of beds 9 and 22 represent 'within-habitat' environmentally condensed assemblages, and formed by densely fossiliferous deposits with highly disarticulated, convex-up oysters along with articulated specimens preserved in life position, and with a moderate to high grades of bioerosion and encrustation. They were deposited by several high-energy events in supratidal and lagoonal environments, respectively. square Shell concentrations, taphonomy, palaeoecology, palaeoenvironment, Miocene, Egypt.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001278301800006
WOS关键词	SHELL BEDS ; SEQUENCE STRATIGRAPHY ; FOSSIL CONCENTRATIONS ; ENTOBIA ICHNOFACIES ; WESTERN DESERT ; TRACE FOSSILS ; SIWA OASIS ; PALEOECOLOGY ; BIOEROSION ; NORTHERN
WOS类目	Paleontology
WOS研究方向	Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404873
推荐引用方式 GB/T 7714	Mansour, Heba,Mandor, Mona,El-Sabbagh, Ahmed,et al. Palaeoenvironmental analysis of bivalve-dominated concentrations from the lower-middle Miocene succession, Gebel Gharra, Cairo-Suez District, Egypt[J],2024,57(2).
APA	Mansour, Heba.,Mandor, Mona.,El-Sabbagh, Ahmed.,El Hedeny, Magdy.,Vinn, Olev.,...&Rashwan, Mohamed.(2024).Palaeoenvironmental analysis of bivalve-dominated concentrations from the lower-middle Miocene succession, Gebel Gharra, Cairo-Suez District, Egypt.LETHAIA,57(2).
MLA	Mansour, Heba,et al."Palaeoenvironmental analysis of bivalve-dominated concentrations from the lower-middle Miocene succession, Gebel Gharra, Cairo-Suez District, Egypt".LETHAIA 57.2(2024).