干旱区生态环境知识资源中心(Arid): Taphonomy and its significant role in palaeoenvironmental reconstruction of the upper Turonian actaeonellid gastropod concentrations of Abu Roash, Western Desert, Egypt

Arid

DOI	10.18261/let.55.1.8
	Taphonomy and its significant role in palaeoenvironmental reconstruction of the upper Turonian actaeonellid gastropod concentrations of Abu Roash, Western Desert, Egypt
	Rashwan, Mohamed; El-Sabbagh, Ahmed; El Hedeny, Magdy; Vinn, Olev; Mansour, Heba
通讯作者	El Hedeny, M
来源期刊	LETHAIA
ISSN	0024-1164
EISSN	1502-3931
出版年	2022
卷号	55 期号:1
英文摘要	The palaeoenvironment of the upper Turonian Trochactaeon salamonis shell concentrations in the Abu Roash area, the northern Western Desert of Egypt, is interpreted based on detailed taphonomic studies. A paucispecific gastropod assemblage of the Actaeonella-bearing limestone-marl member of the Turonian-Coniacian Abu Roash Formation has been studied in two sections. Both actaeonellid gastropod concentrations recorded are characterized by well preserved, moderately to densely packed, poorly to moderately sorted and reoriented specimens. In addition, the gastropod specimens are exclusively recrystallized (neomorphosed calcite), moderately to highly bored, but rarely fragmented, encrusted and/or abraded. The study of bioerosional structures revealed five different ichnotaxa, belonging to three ichnogenera (Clionolithes, Entobia, and Rogerella). Noteworthy is the occurrence of the ichnogenus Clionolithes for the first time in the Cretaceous of North Africa (the southern margin of the Neotethys Ocean). In addition, the ichnospecies Clionolithes cf. radicans has unusual dimensions and morphological features that are definitively an unknown feature for any dendrinid boring, suggesting a probable record for a new Clionolithes ichnospecies. The Trochactaeon salamonis concentrations studied are interpreted to represent a resedimented (parautochthonous) assemblage, which may have been influenced by shallow nearshore warm-water conditions in response to storm activity. Environmental parameters controlling the formation of these gastropod shell concentrations include substrate consistency, water energy, salinity, oxygen availability, and rate of sedimentation, respectively.
英文关键词	Gastropod concentrations taphonomy palaeoenvironment upper Turonian Northeast Africa
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000865725400010
WOS关键词	BENTHIC ASSOCIATIONS ; MIDDLE MIOCENE ; SHELL BEDS ; SIWA OASIS ; PALEOECOLOGY ; SINAI ; FAUNAS ; BASIN ; EVENT ; BIOSTRATIGRAPHY
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/2XILL650/393748
推荐引用方式 GB/T 7714	Rashwan, Mohamed,El-Sabbagh, Ahmed,El Hedeny, Magdy,et al. Taphonomy and its significant role in palaeoenvironmental reconstruction of the upper Turonian actaeonellid gastropod concentrations of Abu Roash, Western Desert, Egypt[J],2022,55(1).
APA	Rashwan, Mohamed,El-Sabbagh, Ahmed,El Hedeny, Magdy,Vinn, Olev,&Mansour, Heba.(2022).Taphonomy and its significant role in palaeoenvironmental reconstruction of the upper Turonian actaeonellid gastropod concentrations of Abu Roash, Western Desert, Egypt.LETHAIA,55(1).
MLA	Rashwan, Mohamed,et al."Taphonomy and its significant role in palaeoenvironmental reconstruction of the upper Turonian actaeonellid gastropod concentrations of Abu Roash, Western Desert, Egypt".LETHAIA 55.1(2022).