Radiocarbon dated sedimentation record up to 2 ka BP on the inner continental shelf off Mangalore, south-west coast of India

摘要

Sediment samples at 1-10 cm, 50-60 cm and 90-100 cm depth of a core raised from the innershelf off Mangalore were dated using C-14 dating technique to obtain a long term sedimentation record in the region. The surface (0-10 cm depth) of the core showed bomb-induced C-14 activity and, hence, were considered as modern sediments. The base of silty-clay (50-60 cm depth) and sandy-clay (90-100 cm depth) layers were dated to 1330 +/- 80 and 2090 +/- 80 years respectively. The sedimentation rate in the study area has not varied much during the past 2 ka BP, which reveals that the sediment supply and hence weathering conditions at the adjacent interland have remained nearly the same during this period. [References: 17]