Linto Alappat

Christ University

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Manfred Frechen

Leibniz Institute for Applied Geophysics

Sumiko Tsukamoto

Leibniz Institute for Applied Geophysics

A. K. Singhvi

Physical Research Laboratory

S. Sree Kumar

Christ University

S. Srinivasalu

National Institute of Ocean Technology

ΑV

Αnnemiek Vink

Federal Institute for Geosciences and Natural Resources

R. Ramesh

Anna University, Chennai

D.V. Srikanth

Indian Institute of Technology Hyderabad

Kartika Goswami

Jiaying University

P. Morthekai

Academy of Scientific and Innovative Research

Cooperative Institutions

Physical Research Laboratory

Christ University

Anna University, Chennai

Pondicherry University

Ministry of Earth Sciences

Federal Institute for Geosciences and Natural Resources

Universidad Nacional Autónoma de México

French Institute of Pondicherry

Leibniz Institute for Applied Geophysics

Leibniz Association

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Chronology of Cauvery Delta Sediments from Shallow Subsurface Cores Using Elevated-Temperature Post-IR IRSL Dating of Feldspar

Geochronometria (2010)

Linto Alappat Sumiko Tsukamoto Priyadarshini Singh D.V. Srikanth R. Ramesh

Chronology of Cauvery Delta Sediments from Shallow Subsurface Cores Using Elevated-Temperature Post-IR IRSL Dating of Feldspar We present the results of luminescence dating of sediments from two cores from the Cauvery Delta in south-east India. Since all natural quartz OSL signals except one sample were in saturation, the elevated temperature post-IR IRSL protocol for K-feldspar was applied to establish a chronology. Internal dose rates of K-feldspar grains were calculated from the measured internal content of potassium, uranium, thorium and rubidium in the bulk of K-feldspar grains using solution ICP-OES and ICP-MS analysis. A substantial scatter in single-aliquot D e values was observed which is most probably due to the effect of incomplete bleaching of fluvial sediments before burial. A minimum age model was applied to extract possible depositional ages. The study revealed that except an upper layer of Holocene sediments (< 5m), the majority of the upper ~50m of Cauvery delta sediments were deposited between marine isotope stage MIS-5 and MIS-10 or older. The feldspar luminescence ages also indicate the existence of a period of non deposition or erosion in the upper part of the cores.

Chronology

Radiometric dating

Thermoluminescence dating

K–Ar dating

10.2478/v10003-010-0025-1

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Citations (37)

Coastal Sand Dunes of Southern India

CRC Press eBooks (2023)

Linto Alappat S. Srinivasalu A. K. Singhvi

India is characterized by long coastline measuring over 7500 km. Coastal dunes are found parallel to the shore at many places at variable elevations and ages. Each dune system in the coast is genetically associated with change in prevailing climatic conditions or sea level. The dunes are characterized by differences in their color, texture, mineralogy, internal structure etc., which may be associated with different depositional conditions. It as an important proxy of paleoclimate studies as it forms a nearly continuous sediment archive and the hiatus is correlated to unfavorable conditions of dune activity. The studies associated with dunes included sedimentology, geochemistry, mineralogy, paleo-magnetics, chronology etc. Large number of archaeological tools and cultural remnants found in dunes, shows that it was a good substrate for early human settlement and migration. The composition of sand is varied at different places, with some places having bio-clasts intercalated with clastic sediments forming large swath of miliolites/ aeolianite deposition along the coasts of Gujarat. Distinct red dunes are found along the south east coasts of India and Sri Lanka, which are associated with their mineralogy and post-depositional weathering conditions. The chapter reviews the dunes as a geomorphological feature, paleo-climate proxy to differentiate their characteristics at different geographical regions along the coast, categorize them based on their chronology of formation and evolutionary process. The new methods of studying dunes, including chronology are discussed based on the available luminescence ages and its methodological advancement will be briefly explained.

Chronology

Phytolith

Sand dune stabilization

Coastal erosion

Paleoclimatology

10.1201/9781003125426-23

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

Journal of Asian Earth Sciences (2011)

Linto Alappat Manfred Frechen R. Ramesh Sumiko Tsukamoto S. Srinivasalu

Sand dune stabilization

Chronology

Tamil

10.1016/j.jseaes.2011.05.019

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Citations (23)

Establishing the Late Pleistocene–Holocene sedimentation boundary in the southern North Sea using OSL dating of shallow continental shelf sediments

Proceedings of the Geologists Association (2010)

Linto Alappat Αnnemiek Vink Sumiko Tsukamoto Manfred Frechen

Optically stimulated luminescence

Deglaciation

10.1016/j.pgeola.2009.12.006

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Citations (22)

Chronology of red dune aggradations of South India and its Palaeo-environmental significance

Geochronometria (2013)

Linto Alappat Palaniandy Seralathan A. D. Shukla K. P. Thrivikramji A. K. Singhvi

Red sand dunes occur in the coastal plains of south east and west of Tamil Nadu, India between the coordinates of 8°00′ to 9°30′ N; 77°18′ to 79° 00′ E. OSL dating of these sands indicated aggradations between ∼16-9 ka and ∼9-3 ka in the west and east coasts respectively. Dating results from inland red dunes at the foothills of Western Ghats show a break in deposition at ∼6 ka and aggradation since ∼2 ka. The sand aggradations in the west coast occurred during the transition period when SW monsoon in the area was reestablishing. The dunes attained their stability by 9 ka. In the coastal region, the aggradations were controlled by sea level changes and a local recycling of earlier dunes (in the east coast). In the inland areas, the dune building was controlled by sand supply from fluvial sources.

Foothills

Sand dune stabilization

Chronology

Aggradation

10.2478/s13386-013-0118-5

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Evidence of Late Holocene shoreline progradation in the coast of Kerala, South India obtained from OSL dating of palaeo-beach ridges

Geomorphology (2015)

Linto Alappat Manfred Frechen S. Sree Kumar D. S. Suresh Babu Rajan Ravur

Progradation

Beach ridge