Io/U ages of corals from Saurashtra coast

Gupta, S. K.; Amin, Basri

doi:10.1016/0025-3227(74)90065-6

Cited by 28 publications

(22 citation statements)

References 4 publications

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“…The presence of coast parallel beach ridges, aeolianites, higher occurrences of dead coral reefs, shell limestone and tidal flats, and also other geomorphic features suggest an oscillating late Quaternary sea level along the Saurashtra coast. The available geochronological data obtained on coral reefs and oyster from the Saurashtra coast indicate the existence of two major high sea strands corresponding to the last interglacial (MIS-5) and mid-Holocene (Gupta and Amin 1974;Brückner et al 1987;Juyal et al 1995;Mathur and Pandey 2002;Mathur 2005). These chronometric data compared with coastal geomorphic features of sea level changes suggest that the last interglacial (MIS-5) high sea strands had eroded the pre-existing miliolite limestone sequences and deposited the bioclast rich beach ridges and associated dunes including the favored growth of coral reefs in suitable coastal segments (Bhonde 2004).…”

Section: Discussionmentioning

confidence: 99%

Geomorphic expression of late Quaternary sea level changes along the southern Saurashtra coast, western India

Bhatt

Bhonde

2006

J Earth Syst Sci

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Geomorphic expression of land-sea interaction is preserved in the form of abandoned cliffs, marine terraces, shore platforms and marine notches along the southern Saurashtra coast. These features have been used to ascertain the magnitude of sea level changes during late Quaternary. Notch morphology and associated biological encrustation have been used to estimate the magnitude and duration of palaeo-sea strands. Marine notches and other erosive features occurring between 12 and 15 m above the present Biological Mean Sea Level (BMSL) are attributed to the last interglacial corresponding to the Marine Isotopic Stage 5 (MIS-5). However, 6 to 9 m upliftment of the coastal fringe is attributed to this sea level. The second major high sea strand was identified during the mid-Holocene when the sea rose 2 m above the present level. Notches corresponding to this high sea level are recorded 4 to 5 m above the present BMSL.

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Section: Discussionmentioning

confidence: 99%

Geomorphic expression of late Quaternary sea level changes along the southern Saurashtra coast, western India

Bhatt

Bhonde

2006

J Earth Syst Sci

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“…There is some evidence to suggest that the sea level stood slightly higher than at present some 6000 years ago. For example, relict corals exposed along the Saurashtra coast (Gupta, 1972;Gupta and Amin, 1974;Somayajulu et aI., 1985), oyster beds in Goa coast, as well as data presented by Verma and Mathur (1979). These deposits point to a sea level ca.…”

Section: Quaternary Eustatic Changesmentioning

confidence: 93%

“…By dating relict corals, Gupta (1972) and Gupta and Amin (1974) concluded that the sea levels on the Saurashtra coast stood higher by 2 to 6 m around 120,000 years BP. Data on the changes in sea level between 120,000 years and 11,000 years BP are not available, a period when sea level was substantially lower than at present.…”

Section: Quaternary Eustatic Changesmentioning

confidence: 98%

Tectonic, Eustatic and Isostatic Changes along the Indian Coast

Subrahmanya¹

1996

Coastal Systems and Continental Margins

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ABSTRACf: The present shape of India is due to a combination of events that took place over geological time, including the breaking away of the Indian Plate from Australia and Antarctica, rifting and drifting between India and Madagascar along the west coast, and collision of the plate with the Asian continent. Following these tectonic events, eustastic changes have played a major role in modifying the east and west coasts ofIndia. Another factor responsible for both past and present regional changes is isostatic movement, resulting in uplift and subsidence, especially in deltaic areas.

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“…Although a great deal has been published on the probable ages of the Saurashtra carbonates (Gupta and Amin, 1974;Baskaran, 1985;Baskaran et al, 1986Baskaran et al, , 1987Baskaran et al, , 1989aBaskaran et al, , 1989bBaskaran et al, , 1991Bruckner, 1989;Gupta, 1991), no reliable chronometric determinations have yet been achieved. Baskaran (1985) used Th/U to date over one hundred carbonate samples from Saurashtra as part of his doctoral research.…”

Section: Carbonate Aeolianites In Southeastern Saurashtramentioning

confidence: 97%

A new Late Pleistocene fauna from arid coastal India: Implications for inundated coastal refugia and human dispersals

Costa

2017

Quaternary International

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a b s t r a c tA diverse Late Pleistocene fossil assemblage was recovered from a sea cliff locality near Gopnath in Gujarat, northwestern India. These remains are the first large sample of Pleistocene faunal materials from arid northwestern India. Several taxa known primarily from coarse alluvial deposits of central India are documented for the first time from an undisturbed open-air site adjoining the Great Indian Desert. The sample includes a new species of antelope from a lineage considered extinct outside of Africa since the Early Pleistocene. The paleoenvironmental context, faunal composition and type of fossil preservation reported here is unique. The Gopnath fauna accumulated in a pond within a carbonate dune field that formed part of a larger coastal oasis ecosystem. This paleoscape occupied the Cambay Gulf during hyperarid glacial low stands. The Gopnath fossils are correlated to Late Acheulean lithics from a coastal cliff locality (<8 km) at Madhuban. These finds provide the first vertebrate evidence of glacial low stands and their influence on Late Pleistocene paleobiogeography within the dynamic dry coastal corridor linking India to Africa. They offer a rare glimpse of a lost landscape and an obscure fossil community that are critical to understanding the paleobiogeography of the hinterland along the Arabian seashore and informing models of early human dispersals.

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Io/U ages of corals from Saurashtra coast

Cited by 28 publications

References 4 publications

Geomorphic expression of late Quaternary sea level changes along the southern Saurashtra coast, western India

Geomorphic expression of late Quaternary sea level changes along the southern Saurashtra coast, western India

Tectonic, Eustatic and Isostatic Changes along the Indian Coast

A new Late Pleistocene fauna from arid coastal India: Implications for inundated coastal refugia and human dispersals

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