Wyniki wyszukiwania - BazTech

Ograniczanie wyników

1 Geochronometria

1 2013

Znaleziono wyników: 1

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

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

Alappat L., Seralathan P., Shukla A. D., Thrivikramji K. P., Singhvi A. K.

Geochronometria

2013

Vol. 40, no. 4

274--282

Red sand dunes occur in the coastal plains of south east and west of Tamil Nadu, India be-tween the co-ordinates 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 ag-gradation since ~2 ka. The sand aggradations in the west coast occurred during the transition period when SW monsoon in the area was re-establishing. 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.