The presence of ice-rafted debris (IRD) in middle Eocene ocean sediments has previously been demonstrated, but it has been unclear whether the source of IRD was land-based glacial ice or sea ice, a distinction with important climate implications.

At times in the past, mobile ocean fronts in the subtropics have exercised an influence on the magnitude of climate change by decoupling temperature from levels of carbon dioxide in the atmosphere.

The modern Arctic Ocean is regarded as a barometer of global change and amplifier of global warming and therefore records of past Arctic change are critical for palaeoclimate reconstruction.

Many aspects of the carbon cycle can be assessed from temporal changes in the 13C/12C ratio of oceanic bicarbonate. 13C/12C can temporarily rise when large amounts of 13C-depleted photosynthetic organic matter are buried at enhanced rates, and can decrease if phytomass is rapidly oxidized2 or if low 13C is rapidly released from methane clathrates.

A study was carried out for the simulation of sediment yield from an agricultural watershed falling in laterite zone of West Bengal using event scale Modified Universal Soil Loss Equation (MUSLE).

Meandering phenomena takes place over an alluvial plane due to fluvial hydraulic forces, influence of gravity and sediment transport. For an alluvial channel, the resistance offered by the bed and bank varies with the bed material and saturation level of the bank-material and as such as the probability of bed load movement depends on the mobilizing force at initial bed condition. In the present study, a Physical Model has been developed considering Froude similitude.

About 33.5 million years ago, at the Eocene

Geomorphologically, the mighty Brahmaputra River system flows over the Quaternary sediments. This is a cause of concern because of its location in an abundant monsoon regime within an active seismogenic volume. Since time immemorial, the Brahmaputra has continued to wreck havoc through repeated floods year after year.

Das et al.1 have studied clay mineralogy, terrigenous and biogenic components of the sediment core collected from the Ocean Drilling Programme site 728A, northwestern continental margin of the Arabian Sea, off Oman.