干旱区生态环境知识资源中心(Arid): Sedimentological analysis of a Late Quaternary coastal dune system: An example from Gopnath, south-east Saurashtra, Western India

Arid

DOI	10.1111/sed.12481
	Sedimentological analysis of a Late Quaternary coastal dune system: An example from Gopnath, south-east Saurashtra, Western India
	Acharya, Bhaskar 1; Bhatt, Nilesh 2
通讯作者	Bhatt, Nilesh
来源期刊	SEDIMENTOLOGY
ISSN	0037-0746
EISSN	1365-3091
出版年	2019
卷号	66 期号:2 页码:435-458
英文摘要	Coastal dune systems consisting of allochemical grains are important sedimentary archives of Pleistocene age in both of the hemispheres between the latitudes of 20 degrees to 40 degrees. The south Saurashtra coast in western India exhibits a large section of Middle Pleistocene aeolianites in the form of coastal cliffs, which is famous as Miliolite'. Miliolites of Gopnath in south-east Saurashtra are the oldest known coastal aeolianite deposits (age >156ka which corresponds to Marine Isotope Stage 6) in western India. Aeolian deposits of similar ages have also been reported from the Thar Desert in north-west India and from Southern Arabia which were largely controlled by the south-west monsoon wind system that affects the entire belt corresponding to Sahara-Sahel, the Arabian Peninsula and north-western India. Miliolite deposits in Gopnath are characterized by grainfall, grainflow and wind ripple laminations. At least three types of aeolian bounding surfaces have been identified. Five major facies have been identified which represent the dune and interdune relationship within the coastal aeolian system. The major dune bodies are identified as transverse dune types. The Gopnath aeolianites were deposited under dominantly dry aeolian conditions. Facies association reveals two different phases of aeolian accumulation, namely initiation of aeolian sedimentation after a prolonged hiatus and the establishment of a regularized aeolian sedimentation system. While initiation of aeolian sedimentation is marked by vast stretches of sheet sand with occasional dune bodies, the overlying thick, tabular, laterally extensive cross-stratified units manifest regular aeolian sedimentation. However, the dune building events in Gopnath were interrupted by development of laterally extensive palaeosol horizons. Eustasy and climate exerted the major allogenic controls on the aeolian sedimentation by affecting the sediment budget as well as influencing the sedimentation pattern.
英文关键词	Aeolianites coastal dunes Late Quaternary Miliolite Saurashtra south-west Monsoon Western India
类型	Article
语种	英语
国家	India
收录类别	SCI-E
WOS记录号	WOS:000461255500003
WOS关键词	STRATIGRAPHIC EVOLUTION ; AEOLIANITE DEPOSITS ; BOUNDING SURFACES ; CUDDAPAH BASIN ; SANDSTONE ; FACIES ; STRATIFICATION ; PRESERVATION ; ARCHITECTURE ; RECOGNITION
WOS类目	Geology
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/2XILL650/218824
作者单位	1.Oil & Nat Gas Corp ONGC Ltd, WON Basin, Makarpura Rd, Vadodara 390009, India; 2.Maharaja Sayajirao Univ Baroda, Dept Geol, Fac Sci, Vadodara 390002, India
推荐引用方式 GB/T 7714	Acharya, Bhaskar,Bhatt, Nilesh. Sedimentological analysis of a Late Quaternary coastal dune system: An example from Gopnath, south-east Saurashtra, Western India[J],2019,66(2):435-458.
APA	Acharya, Bhaskar,&Bhatt, Nilesh.(2019).Sedimentological analysis of a Late Quaternary coastal dune system: An example from Gopnath, south-east Saurashtra, Western India.SEDIMENTOLOGY,66(2),435-458.
MLA	Acharya, Bhaskar,et al."Sedimentological analysis of a Late Quaternary coastal dune system: An example from Gopnath, south-east Saurashtra, Western India".SEDIMENTOLOGY 66.2(2019):435-458.