Journal ArticleDOI
Backwash-and-swash-oriented current crescents: indicators of beach slope, current direction and environment
TLDR
In this paper, backwash-and-swash-oriented current crescents are reported, with their detailed morphology and formation mechanism from the siliciclastic fine sandy beaches of Sagar Island and Lower Long Sand, two tidal islands of the Ganga estuary, northeast India.About:
This article is published in Sedimentary Geology.The article was published on 1993-04-01. It has received 15 citations till now. The article focuses on the topics: Swash.read more
Citations
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Water quality management in the lower stretch of the river Ganges, east coast of India: an approach through environmental education
Santosh Kumar Sarkar,Mahua Saha,Hideshige Takada,Asokkumar Bhattacharya,Pravakar Mishra,Badal Bhattacharya +5 more
TL;DR: In this paper, the physicochemical characteristics and level of dissolved heavy metals at three ecologically distinct zones along the course of the Ganges river were examined and it was revealed that socioeconomic development of Calcutta, the most potential economic zone in India situated on the east bank of Hugli river, has had a significant impact on the water quality of this major river.
Journal ArticleDOI
Polycyclic Aromatic Hydrocarbons in Intertidal Marine Bivalves of Sunderban Mangrove Wetland, India: An Approach to Bioindicator Species
O. Zuloaga,A. Prieto,Aresatz Usobiaga,S. K. Sarkar,Mousumi Chatterjee,Bhaskar Deb Bhattacharya,A. Bhattacharya,Md. A. Alam,Kamala Kanta Satpathy +8 more
Abstract: The paper presents the first comprehensive account of congener profiles of polycyclic aromatic hydrocarbons (PAHs) in intertidal bivalve mollusks [Meretrix meretrix, Macoma birmanica, and Sanguilonaria (Soletellina) acuminata] of Sunderban mangrove wetland (India). The main aim of this work was to use the bivalves as bioindicators of the contamination of the 16 USEPA PAH. The PAH profile in bivalves is largely dominated by a petrogenic fingerprint, with over-imposition of pyrolytic PAH sources, as evidenced by diagnostic molecular ratios. Bioaccumulation factors (BAF) of individual compounds from the sediments were calculated, and it reveals overall higher values in the visceral mass of the bivalves. S acuminata showed significantly higher levels of PAHs, especially the high molecular weight (HMW) PAHs, compared to the other two species as a sensitive indicator of trace organic stress in future monitoring programs.
Journal ArticleDOI
Experimental investigation of the impacts of coherent flow structures upon turbulence properties in regions of crescentic scour
H. Maity,Bijoy S. Mazumder +1 more
TL;DR: In this article, the spatial distribution of third-order moments of velocity fluctuations, the turbulent kinetic energy (TKE) fluxes, and the conditional statistics of Reynolds shear stress across the equilibrium crescentic scour structures generated upstream of short horizontal static cylinders were examined.
Journal ArticleDOI
Classification, formation, and transport mechanisms of mud clasts
TL;DR: In this article, the relative balance of volumetric abundance of sedimentary clasts in non-marine to marine sedimentary records is identified as the most important criterion for classification.
Journal ArticleDOI
Generation, transport and preservation of armoured mudballs in an ephemeral gully system
TL;DR: In this paper, the authors used two adjacent catchments developed on identical geology in southeast Spain that offer a unique opportunity to examine the key controls on armoured mudball development as one catchment produces armoured mudballs whilst the second does not.
References
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Journal ArticleDOI
Directional-current structures from the prealpine flysch, switzerland
TL;DR: Gurnigel sandstone beds in the Paleocene-Eocene Flysch of the External Prealps, Switzerland, contain primary structures which display common orientation through many feet of strata as discussed by the authors.
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Studies on Orientation and Imbrication of Pebbles with Respect to Cross-stratification
TL;DR: In this paper, the orientation and plunge of the long axes of pebbles are found to be guided by the initial slope of the depositing bed; and this plunge and orientation may vary in the different portions of the cross-strata.
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Current crescents in the Triassic Moenkopi Formation [Arizona]
TL;DR: In this paper, the authors described crescentic structures made by shallow water flowing around stranded pebbles in the Lower Triassic Moenkopi formation of Arizona, which are not the tracks of animals as postulated for similar structures in the Upper Triassic Bunter formation of Germany.
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Current crescents formed by marine algae (Valonia sp.): a new record of obstacle marks lacking preservation of obstacles
TL;DR: In this paper, the authors describe a set of U-shaped or crescentic marks 2 cm in width with arms 1-3 cm in length around a circular filamentous impression, formed by the marine globose algae Valonia sp., which bloom profusely in the waters of the Bay of Bengal during winter.
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