Shankar, R., Karbassi, A. R. (1992) Sedimentological Evidence for a Palaeobeach off Mangalore, West Coast of India. Journal Geological Society of India, 40 (3). 241-252 doi:10.17491/jgsi/1992/400306
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Sedimentological Evidence for a Palaeobeach off Mangalore, West Coast of India | ||
| Journal | Journal Geological Society of India | ||
| Authors | Shankar, R. | Author | |
| Karbassi, A. R. | Author | ||
| Year | 1992 (September 1) | Volume | 40 |
| Page(s) | 241-252 | Issue | 3 |
| Publisher | Geological Society of India | Place | Bangaluru, India |
| URL | |||
| DOI | doi:10.17491/jgsi/1992/400306Search in ResearchGate | ||
| Generate Citation Formats | |||
| Classification | Not set | LoC | Not set |
| Mindat Ref. ID | 18245537 | Long-form Identifier | mindat:1:5:18245537:1 |
| GUID | 0 | ||
| Full Reference | Shankar, R., Karbassi, A. R. (1992) Sedimentological Evidence for a Palaeobeach off Mangalore, West Coast of India. Journal Geological Society of India, 40 (3). 241-252 doi:10.17491/jgsi/1992/400306 | ||
| Plain Text | Shankar, R., Karbassi, A. R. (1992) Sedimentological Evidence for a Palaeobeach off Mangalore, West Coast of India. Journal Geological Society of India, 40 (3). 241-252 doi:10.17491/jgsi/1992/400306 | ||
| In | (1992, September) Journal of the Geological Society of India Vol. 40 (3). Geological Society of India | ||
| Abstract/Notes | Abstract Sedimentological and SEM studies have been carried out on surface and sub-surface samples of outer shelf sands off Mangalore, west coast of India. The outer shelf sediments can be described as coarse sands, moderately sorted, nearly symmetrical to positively skewed and mesokurtic. Multi group discriminant analysis of the data shows that the sands were deposited in a beach environment during Pleistocene when the sea level was lower than at present. SEM studies reveal mechanically formed features like 'v' pits and curved grooves, which also corroborate the beach environment of deposition. The' v' pits and grooves have been smoothened due to chemical etching of the grains as the latter were in contact with sea water subsequent to the Pleistocene-Holocene transgression. Similar sand in cores obtained from east of the palaeobeach indicates its extension beneath Recent sediments. The thickness of palaeobeach sand increases landward. The cores studied have recorded tbe marsh Get black colour and abundance of vegetative matter), beach (coarse sands) and inner shelf (clayey silt) environments that prevailed at the core site as the sea transgressed. It is proposed that the outer shelf sands were not covered by Recent sediments because of the insufficient supply of sediments from the small, west-flowing rivers of Peninsular India, entrapment of sediments in estuaries, and onshore transport of sediments in the West coast region. | ||
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