Continental margin systems are important contributors to global nutrient and carbon budgets. Effort is needed to quantify this contribution and how it will be modified under changing patterns of climate and land use. Coupled models will be used to provide projections of future states of continental margin systems. Thus, it is appropriate to consider the limitations that impede the development o...

A first objective is to investigate the fabric (pattern) of seabed stratification on continental margins at small time and space scales (1 cm-50 cm depth into the seabed; 1 hr-3 yrs sedimentary record). To this end, we are testing the hypothesis that on muddy shelves such as the northern California shelf, Holocene event stratigraphy consists of the deposits of high-concentration storm regimes a...

GSA Today: v. 16, no. 2, doi: 10.1130/1052-5173(2006)016<4:TIAACM>2.0.CO;2 INTRODUCTION Forty years ago, the eastern margin of North America inspired Tuzo Wilson (1966) to ask, “Did the Atlantic close and then re-open?” The Wilson cycle of closing and opening of ocean basins incorporates the cyclic assembly and breakup of supercontinents. Alternate processes of extension and compression of cont...

Late Pleistocene Labrador Sea depositional systems developed in front of ice streams and glacier outlets from the Laurentide Ice Sheet (LIS) are documented by Huntec 3.5 kHz seismic profiles piston cores. Due to efficient grinding LIS, massive amounts fine-grained sediments meltwater addition icebergs linked Heinrich events (H events) last glaciation were delivered neighboring Sea. The position...

We present the geological map of north-eastern margin Fucino Basin, which is mainly characterized by Plio-Quaternary continental deposits that show transition from deeper-water lacustrine environment, marginal system, and fluvial facies. These unconformably overlie upper Messinian Lago-Mare sediments pre-orogenic carbonate succession. The occurrence Caspiocypris tiberina in sediments, coupled w...

This study examined the natural diversity and distributions of sulfate-reducing bacteria along a natural carbon gradient extending down the shelf-slope transition zone of the eastern Pacific continental margin. Dissimilatory (bi)sulfite reductase gene sequences (dsrAB) were PCR amplified and cloned from five different sampling sites, each at a discrete depth, from two different margin systems, ...

The exchange of waters between the Pacific and the Southern Oceans occurs along the eastern boundary of the South Pacific. Because water masses of the Antarctic provide a connection among the world’s ocean basins, these water masses maintain the ability to influence changes in ocean circulation and climate (Lynch-Stieglitz et al., 1996). One of the primary goals of Ocean Drilling Program (ODP) ...

The Indus fan is the most pronounced and extensive physiographic and sedimentary feature of the Arabian Sea as well as it is the second largest submarine fan in the world. It has developed off the passive continental margin of Pakistan and India, covering an area of about 1.1 x10 km which makes it one of the largest sediment bodies in the ocean basins, totalling ~5 x 10 km in volume. The presen...

This paper aims to study the geochemical characteristics of shale of Disang group of Eocene age. Geochemical study and the data reported indicate that Shales are deposited under the marine condition. Tectonic setting was active continental margin to passive continental margin and sediments were derived from volcanic and/or granitic source area. Study reveals that Source-rating of studied shale ...

[1] Sediment flux from rivers to oceans is the fundamental driver of fluvio-deltaic morphodynamics and continental margin sedimentation, yet sediment transport across the river-to-marine boundary is poorly understood. Coastal rivers typically are affected by backwater, a zone of spatially decelerating flow that is transitional between normal flow upstream and the offshore river plume. Flow dece...