Periods of recent dune sand mobilisation in Cuddalore, Southeast India
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In: Zeitschrift der Deutschen Gesellschaft für Geowissenschaften, Vol. 161, No. 3, 09.2010, p. 353-368.
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TY - JOUR
T1 - Periods of recent dune sand mobilisation in Cuddalore, Southeast India
AU - Frechen, Manfred
AU - Ramachandran, Ramesh
AU - Urban, Brigitte
AU - Kunz, Jan-Alexander
PY - 2010/9
Y1 - 2010/9
N2 - In this study the results from optically stimulated luminescence (OSL) dating of dune sands from the southeast coast of India are presented. The samples were taken from a dune belt running parallel to the coast of Tamil Nadu between the cities of Cuddalore and Porto Novo. Based on previous studies of sea level changes a Holocene age of the sand mobilization was expected. Our results show a very young age of dune formation. The investigated dunes are not older than 200 years. Periods of increased sand movement are recorded in the dunes. These periods correlate with reduced rainfall during the NE-monsoon in Tamil Nadu. A soil-like horizon and an event layer with dewatering structures provide evidence for environmental changes within the last 200 years. This work demonstrates the application of OSL dating on recent sediments and the potential of the dunes in the study area for palaeoenvironmental reconstruction.
AB - In this study the results from optically stimulated luminescence (OSL) dating of dune sands from the southeast coast of India are presented. The samples were taken from a dune belt running parallel to the coast of Tamil Nadu between the cities of Cuddalore and Porto Novo. Based on previous studies of sea level changes a Holocene age of the sand mobilization was expected. Our results show a very young age of dune formation. The investigated dunes are not older than 200 years. Periods of increased sand movement are recorded in the dunes. These periods correlate with reduced rainfall during the NE-monsoon in Tamil Nadu. A soil-like horizon and an event layer with dewatering structures provide evidence for environmental changes within the last 200 years. This work demonstrates the application of OSL dating on recent sediments and the potential of the dunes in the study area for palaeoenvironmental reconstruction.
KW - Environmental planning
KW - Dune
KW - Environmental change
KW - Holocene
KW - India
KW - OSL dating
UR - http://www.scopus.com/inward/record.url?scp=79959299001&partnerID=8YFLogxK
U2 - 10.1127/1860-1804/2010/0161-0353
DO - 10.1127/1860-1804/2010/0161-0353
M3 - Journal articles
VL - 161
SP - 353
EP - 368
JO - Zeitschrift der Deutschen Gesellschaft für Geowissenschaften
JF - Zeitschrift der Deutschen Gesellschaft für Geowissenschaften
SN - 1860-1804
IS - 3
ER -