William Ussler

TL;DR: Results of rRNA gene surveys and lipid analyses of archaea and bacteria associated with methane seep sediments from several different sites on the Californian continental margin suggest that other bacteria and archaea are also involved in methane oxidation in these environments.

TL;DR: In this article, pore-water sulfate profiles measured in piston cores are used to estimate methane flux toward the sea floor and to detect anomalous methane gradients within sediments overlying a major gas hydrate deposit at the Carolina Rise and Blake Ridge (U.S. Atlantic continental margin).

TL;DR: In this article, the authors test a hypothesis relating large pore water sulfate gradients to upward methane flux and the presence of underlying methane gas hydrate on continental rises by examining: (1) Pore water geochemical data available from the global data set of Deep Sea Drilling Project-Ocean Drilling Program (DSDP-ODP) sites; (2) sulfate data from 51 coring sites located at the Carolina Rise and Blake Ridge (offshore southeastern United States); and (3) the relationship between the distribution of bottom-simulating reflectors (BS

TL;DR: In this article, the authors consider the response to sea-level changes by the immense amount of gas-hydrate that exists in continental rise sediments, and suggest that release of methane trapped in the deep-sea sediments as gashydrates may provide a negative feedback to advancing glaciation.

TL;DR: Authigenic carbonates from five continental margin locations, the Eel River Basin, Monterey Bay, Santa Barbara Basin, the Sea of Okhotsk, and the North Sea, exhibit a wide range of mineralogical and stable isotopic compositions.