Middle and late Holocene sea level changes in and around Pulicat Lagoon, Bay of Bengal, India

Vaz, G. Gaitan; Banerjee, Pritha

doi:10.1016/s0025-3227(97)00008-x

Cited by 31 publications

(10 citation statements)

References 10 publications

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“…The study is supported by the satellite records (Hema Malini and Nageshwara, 2004) which reveal widening of Nilarevu mouth due to shoreline intrusion attributed to low fresh water influx enhanced by anthropogenic activities. The present study suggests that variations in relative sea-level recorded from different segments of the Indian coast during the Late Holocene (Farooqui and Vaz, 2000;Seetharamaiah et al 2005;Vaz and Banerjee, 1997) could be attributed to neotectonics and changes in wetland configuration induced by shifting of river courses and subsequently the river mouths.…”

Section: Discussionmentioning

confidence: 58%

Thecamoebians and palynological assemblage in Gautami-Godavari River mouth, India: Environment and sea level since 3000 years

Farooqui¹,

Naidu

2010

J Geol Soc India

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Palaeoclimate and palaeoecological study was carried out using palynological and thecamoebian evidences buried in ~ 4 m vertically exposed sediment section (12 km inland from the present shoreline) of Late Holocene age along the banks of Gautami-Godavari River and from three shallow cores from its Nilarevu tributary, Andhra Pradesh. Inferred climatic periods include (1) a basal cold/arid period (~3000-2000 yrs BP) with dominance of Botryococcus and other fresh water algal remains coupled with abundance of 25 species of thecamoebians indicating shallow and lentic ecosystem during most of the period and (2) a relatively warm/wet conditions (since ~2000 yrs BP) reveal lotic fresh water ecosystem characterized by the evidences of tree palynotaxa and low percentage of thecamoebians. The three shallow cores (0.5 -1 m) near the mouth (~8 km stretch) of the Nilarevu tributary reveal fluvio-marine deposition in the top 50-80 cm sediment unlike the deeper fresh water depositional environment suggesting sea water ingression in the recent decades. The study illustrates that the Gautami-Godavari River delta gradually prograded since ~3000 yrs BP until 100-150 yrs unlike the intermittent relative sea level rise and fall recorded during the same period in the contemporary south-east deltaic areas.

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Section: Discussionmentioning

confidence: 58%

Thecamoebians and palynological assemblage in Gautami-Godavari River mouth, India: Environment and sea level since 3000 years

Farooqui¹,

Naidu

2010

J Geol Soc India

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“…Based on 14C dating Ramasamy et al (1998) proposed a shore line progradation of 2.8 km per century between Kodiyakkadu and present day coast. Other evidences of rapid accumulation of sediments in the east coast of India reported in previous studies (Vaz and Banerjee, 1997) such as formation of young dunes/beach ridge complex on Sriharikota Island and depletion of depth of the Pulicat lagoon in southern Andhra Pradesh is attributed to a drop in sea level during Little Ice Age. Such a high rate of sand accretion along the Point Calimere region is attributed to the southward transport of sediments eroded from the north, mainly late Holocene coastal alluvium, palaeobeach ridges and dunes as well as sediments from the tributaries of Cauvery River (Sundararajan et al, 2009).…”

Section: Sediment Provenance and Transportationmentioning

confidence: 65%

Evolution of late Holocene coastal dunes in the Cauvery delta region of Tamil Nadu, India

Alappat

Frechen

Ramesh

et al. 2011

Journal of Asian Earth Sciences

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“…It was concluded that the presence of such large relict foraminifera indicates the presence of Late Pleistocene coral reef (Vaz, 1996(Vaz, , 2000. The presence of relict larger foraminifera was also used to reconstruct episodic sea level rise during Early Holocene, and the findings matched well with Late Pliestocene-Holocene sea level variations in this region (Vaz and Banerjee, 1997;Banerjee, 2000). Later, similar relict foraminifera were also reported from 29 to 160 m water depth zone off Myanmar region, Bay of Bengal (Panchang et al, 2008).…”

Section: Introductionmentioning

confidence: 69%

Deterioration of Early Holocene coral reef due to sea level rise along west coast of India: Benthic foraminiferal testimony

Mazumder¹,

Nigam

Henriques

2012

Geoscience Frontiers

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A total of 103 surface sediment samples collected from the water depth range of 15e3300 m along Vijaydurg-Karwar stretch of central west coast of India were analyzed for foraminiferal content. Relict benthic foraminiferal assemblage was noted within 50e135 m water depth. The relict benthic foraminiferal assemblage that includes Amphistegina, Operculina and Alveolinella in sediment samples within the water depth of 85e135 m indicates presence of coral reef at this depth during Early Holocene. The presence of barnacle fouling on Relict foraminifera at 60e90 m confirms the paleo-shoreline. The shallow depth zone is characterized by presence of agglutinated relict foraminifera. The agglutinated forms indicate freshwater influx, which eventually increased the sea level and subsequently deteriorated the paleo-coral reef. ª 2011, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. All rights reserved.

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Middle and late Holocene sea level changes in and around Pulicat Lagoon, Bay of Bengal, India

Cited by 31 publications

References 10 publications

Thecamoebians and palynological assemblage in Gautami-Godavari River mouth, India: Environment and sea level since 3000 years

Thecamoebians and palynological assemblage in Gautami-Godavari River mouth, India: Environment and sea level since 3000 years

Evolution of late Holocene coastal dunes in the Cauvery delta region of Tamil Nadu, India

Deterioration of Early Holocene coral reef due to sea level rise along west coast of India: Benthic foraminiferal testimony

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