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Selvaraj, K.
- Depositional Environment of Cuddalore Sandstone Formation, Tamil Nadu
Abstract Views :553 |
PDF Views:2
Authors
K. Selvaraj
1,
S. Ramasamy
1
Affiliations
1 Department of Geology, University of Madras, A.C. College Campus, Madras 600 025, IN
1 Department of Geology, University of Madras, A.C. College Campus, Madras 600 025, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 51, No 6 (1998), Pagination: 803-812Abstract
Cuddalore Sandstone (Mio-Pliocene) of Neyveli and Ariyalur areas has been studied to infer the depositional environment. Granulometrically, poorly to moderately sorted and fine to very finely skewed sandstones are petrographically identified as feldsarenite and litharenite. Source area for the Neyveli sediments included pyroxenite, amphibolite and granodiorite and the Ariyalur sediments were probably, derived from granite and monzonite. Major elemental data show the eugeosynclinal tectonic setting for Neyveli and taphrogeosynclinal setting for Ariyalur area. The overall study suggests a deltaic environment.Keywords
Sedimentology, Cuddalore Sandstone, Mio-Pliocene, Depositional Environment, Neyveli, Tamil Nadu.- Modification of a Coastal Environment: Vedaranniyam Wetland, Southeast Coast of India
Abstract Views :221 |
PDF Views:137
Authors
Affiliations
1 Department of Geology, School of Earth and Atmospheric Sciences, University of Madras, A C College Campus, Chennai - 600 025, IN
2 Centro de lnvestigaciones en Ciencias de la Tierra, Universidad Autonoma del Estado de Hidalgo, Ciudad Universitaria, Carretera Pachuca-Tulancingo, Pachuca, Hidalgo, C Postal 42184, MX
3 Departrnent of Geology, Anna University, Chennai - 600 025, IN
1 Department of Geology, School of Earth and Atmospheric Sciences, University of Madras, A C College Campus, Chennai - 600 025, IN
2 Centro de lnvestigaciones en Ciencias de la Tierra, Universidad Autonoma del Estado de Hidalgo, Ciudad Universitaria, Carretera Pachuca-Tulancingo, Pachuca, Hidalgo, C Postal 42184, MX
3 Departrnent of Geology, Anna University, Chennai - 600 025, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 66, No 5 (2005), Pagination: 535-538Abstract
The study of SPOT (1988) and IRS-1C (1998) images along with topographic maps (1928 and 1969-70) indicates that the wetland of Vedaranniyam has undergone significant landform modifications over a period of 70 years (1928-1998). Changes in shape and extent of the Mullippallam and Serattalaikkadu creeks, migrating confluence of stream Koraiyar towards north, development of mangrove vegetation, progradation and retrogradation of shoreline and increasing number of salt pans are determined and quantified. The study shows that fluctuations in the discharge of river flows and sediment loads associated with NE monsoon intensity and human interference through salt pan and agricultural activities are manly responsible for the dynamic changes observed in the area.Keywords
Coastal Landforms, Fluvial Processes, Human Activity, Remote Sensing, Vedaranniyam Wetland, Tamil Nadu.- Textural Variation and Depositional Environments of Innershelf Sediments, off Kalpakkam, Southeast Coast of India
Abstract Views :173 |
PDF Views:2
Authors
K. Selvaraj
1,
V. Ram Mohan
2
Affiliations
1 Department of Geology, School of Earth and Atmospheric Sciences, University of Madras, A.C. College Campus, Chennai - 600 025, IN
2 Present address: Ocean Science & Technology Ceil (Marine Geology and Geophysics), Mangalore University, Mangalagangothri, Mangalore - 574 199, Karnataka, IN
1 Department of Geology, School of Earth and Atmospheric Sciences, University of Madras, A.C. College Campus, Chennai - 600 025, IN
2 Present address: Ocean Science & Technology Ceil (Marine Geology and Geophysics), Mangalore University, Mangalagangothri, Mangalore - 574 199, Karnataka, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 61, No 4 (2003), Pagination: 449-462Abstract
Surface sediment samples collected from 42 locations up to a water depth of 53 m during pre-NE monsoon (September, 1 995) and post-NE monsoon (April, 1996) seasons in the innershelf region, off Kalpakkam, were analysed for textural parameters, calcium carbonate and organic matter. Grain size distribution shows that the innershelf is carpeted with a mosaic of sand and silty sand with minor amounts of clay (0-4%). The analysed sediments are characteristically very poorly and poorly sorted, and dominantly positively skewed with very leptokurtic and very platykurtic nature. The occurrence of relict sediments in the form of coarse sand deposit around 19th km from the present shoreline has been identified as a palaeoshoreline. Bivariate plots of grain size parameters reveal that the sedimentary depositional environment is influenced dominantly by river/dune/beach conditions. A linear patch of coarse sand with higher concentration of CaC03 (>15%) and very low organic matter (<0.4%) at a depth around 50-53 m confirms the existence of the palaeoshoreline, formed probably during Holocene low sea level. SEM photomicrographs also support the occurrence of energy enviroment related to shoreline.Keywords
Size analysis, Cac03, Organic matter, SEM, Palaeoshoreline, Mid-Holocene, Sea Level, Kalpakkam, Tamil Nadu coast.- Distribution of Nondetrital Trace Metals in Sediment Cores from Ennore Creek, Southeast Coast of India
Abstract Views :164 |
PDF Views:2
Authors
Affiliations
1 Ocean Science & Technology, Cell (Marine Geology and Geophysics), Mangalore University, Mangalagangothri - 574 199, Karnataka, IN
2 Department of Geology, School of Earth and Atmospheric Sciences, University of Madras, A.C. College Campus, Chennai - 600 025, IN
1 Ocean Science & Technology, Cell (Marine Geology and Geophysics), Mangalore University, Mangalagangothri - 574 199, Karnataka, IN
2 Department of Geology, School of Earth and Atmospheric Sciences, University of Madras, A.C. College Campus, Chennai - 600 025, IN