Late Quaternary Seismic Sequence Stratigraphy of the Gulf of Kachchh, Northwest of India
| Autor: | K. H. Vora, Laju Michael, D. Gopala Rao, K. S. Krishna |
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| Rok vydání: | 2009 |
| Předmět: | |
| Zdroj: | Journal of Coastal Research. 252:459-468 |
| ISSN: | 1551-5036 0749-0208 |
| DOI: | 10.2112/07-0873.1 |
| Popis: | High-resolution seismic reflection and bathymetric data in 10 to 50 m water depth in the Gulf of Kachchh, northwest of India, have been analysed together with earlier results from the area. They have revealed geomorphic features and Late Quaternary seismic sequence stratigraphy of 25-m-thick sediments. Seabed topography is uneven except in the east, carpeted by thick acoustically transparent to semitransparent sediment clays and stratified limestone beds. The sediments consist of (i) the transparent unit “A” up to 12 m thick, (ii) thick 8 to 10 m diffuse seismic reflection free unit “D,” and (iii) 4 to 5 m thick hummocky reflections unit “K.” The geomorphic/subsurface features are pinnacles (1 to 2 m high) and mounds (4 to 5 m high) on the seafloor and subsurface in the south and west, valleys (1 to 3 m) on the seafloor in the south and subsurface in the north and onlap of reflectors in the north. They mark corals, seafloor incisions, and sediment influx. Spatial shifts of valleys that mark a hig... |
| Databáze: | OpenAIRE |
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