Results 81 to 90 of about 661,384 (261)

Ocean Sediment Coring Program

Eos, Transactions American Geophysical Union, 1971
The Ocean Sediment Coring Program is providing samples of sediments and a small amount of crystalline volcanic or igneous rock from far beneath the floor of the deep ocean basins. Drilling uses largely proven and conventional rotary drilling technology.The program fulfills a real need of the times.
openaire   +1 more source

Ecology of Thioploca spp.: Nitrate and sulfur storage in relation to chemical microgradients and influence of Thioploca spp. on the sedimentary nitrogen cycle

, 2001
Microsensors, including a recently developed NO3 − biosensor, were applied to measure O2 and NO3 − profiles in marine sediments from the upwelling area off central Chile and to investigate the influence of Thioploca spp.
Jørgensen, B., Kjær, T., Nielsen, L., Zopfi, J.   +3 more
core  

New organic matter degradation proxies: Valid in lake systems? [PDF]

, 2004
We determined concentrations and diagenetic state of organic matter in two cores from Lake Zug, Switzerland. To obtain a general picture of organic matter decay in the lake, we measured bulk parameters such as total organic carbon, total nitrogen, and ...
Cowie, G. L., Dittrich, M., Meckler, A. N., Peiffer, S., Schubert, C. J.   +4 more
core   +1 more source

Plutonium Signatures in a Dated Sediment Core as a Tool to Reveal Nuclear Sources in the Baltic Sea. [PDF]

Environ Sci Technol, 2023
López-Lora M, Olszewski G, Chamizo E, Törnquist P, Pettersson H, Eriksson M.   +5 more
europepmc   +1 more source

Testing the impact of diagenesis on the delta O-18 and delta C-13 of benthic foraminiferal calcite from a sediment burial depth transect in the equatorial Pacific [PDF]

, 2013
Stable oxygen and carbon isotope (δ18O and δ13C) values measured in foraminiferal calcite are one of the primary tools used in paleoceanography. Diagenetic recrystallisation of foraminiferal calcite can act to reset primary isotopic values but its ...
Edgar, Kirsty M., Paelike, Heiko, Wilson, Paul A.   +2 more
core   +4 more sources

Can a Sediment Core Reveal the Plastic Age? Microplastic Preservation in a Coastal Sedimentary Record. [PDF]

Environ Sci Technol, 2022
Simon-Sánchez L, Grelaud M, Lorenz C, Garcia-Orellana J, Vianello A, Liu F, Vollertsen J, Ziveri P.   +7 more
europepmc   +1 more source

Discovery Prospects for a Supernova Signature of Biogenic Origin

, 2011
Approximately 2.8 Myr before the present our planet was subjected to the debris of a supernova explosion. The terrestrial proxy for this event was the discovery of live atoms of 60Fe in a deep-sea ferromanganese crust.
Basu, Bazylinski, Bosch, de Baar, Egli, Egli, Egli, Faivre, Fields, Fitoussi, Jickells, Knie, Knie, Knie, Knie, Kopp, Limongi, Limongi, Moskowitz, Nomoto, R. Egli, Rauscher, Roden, Rugel, S. Bishop, Wang, Woosley, Zachara   +27 more
core   +1 more source

Reconstructing the chronology of the natural and anthropogenic uranium isotopic signals in a marine sediment core from Beppu Bay, Japan. [PDF]

Heliyon, 2023
Takahashi H, Sakaguchi A, Hain K, Wiederin A, Kuwae M, Steier P, Takaku Y, Yamasaki S, Sueki K.   +8 more
europepmc   +1 more source

A Close-Interval Fractionator for Sediment Cores

Ecology, 1974
A bstract. Extrusion and fractionation are necessary steps for most sediment core analyses. We designed a new device that rapidly fractionates the core sample as it is extruded from the core tube. The fractionator works well with consolidated or fluid sediments.
Arlo W. Fast, Robert G. Wetzel
openaire   +2 more sources

Investigation of echo sounding parameters for the characterisation of bottom sediments in a sub-tropical reservoir

Advances in Oceanography and Limnology, 2016
The increasing number of reservoirs around the world today reaches a surface area of around 500,000 km², equaling one third of that of non-artificial surface water bodies.
Stephan Hilgert, Adrian Wagner, Lisa Kiemle, Stephan Fuchs   +3 more
doaj   +1 more source