Corg, CaCO3, bulk densities, accumulation rates and ages of ODP Leg 167 sites and three piston cores, California margin

Sediments from five Leg 167 drill sites and three piston cores were analyzed for Corg and CaCO3. Oxygen isotope stratigraphy on benthic foraminifers was used to assign age models to these sedimentary records. We find that the northern and central California margin is characterized by k.y.-scale events that can be found in both the CaCO3 and Corg time series. We show that the CaCO3 events are caused by changes in CaCO3 production by plankton, not by dissolution. We also show that these CaCO3 events occur in marine isotope Stages (MIS) 2, 3, and 4 during Dansgaard/Oeschger interstadials. They occur most strongly, however, on the MIS 5/4 glaciation and MIS 2/1 deglaciation. We believe that the link between the northeastern Pacific Ocean and North Atlantic is primarily transmitted by the atmosphere, not the ocean. Highest CaCO3 production and burial occurs when the surface ocean is somewhat cooler than the modern ocean, and the surface mixed layer is somewhat more stable.

Sedimentary mineralogy of argillaceous sediments at DSDP Legs 56-57 Holes

Mineral assemblages of DSDP Holes 436 and 438A and the upper section of Hole 439 (871.5-911.0 m sub-bottom) resemble each other and are composed of montmorillonite (probably a small portion of montmorillonite/illite mixed-layer clays), illite, chlorite, kaolinite, quartz, plagioclase, hornblende, calcite, dolomite, siderite, gypsum, pyrite, and halite. In the middle section of Hole 439 (933.5-1041.0 m), clinoptilolite is also found. In the lower section of Hole 439 (1077.5-1150.0 m), montmorillonite is not confirmed, and clinoptilolite and mixed-layer illite are found. These assemblages, which also contain detrital kaolinite, are generally found in sediments from brackish-water environments. At Site 439, more than 1000 meters of sediment might have been removed by erosion at the base.

Phytoplankton parameters in the Large Aral Sea in June 2008

Species composition, abundance, and biomass of phytoplankton in the surface water layer were determined at 10 stations in the central part of the Western Basin (WB) and at one station in the Eastern Basin (EB) of the Large Aral Sea. 42 algal species were found. Diatoms had the highest number of species. Similarity of phytoplankton composition in the WB was high, whereas phytoplankton composition in the WB and EB differed significantly. In WB abundance and biomass of phytoplankton varied from 826x10**3 to 6312x10**3 cells/l (aver. 1877x10**3 cells/l) and from 53 to 241 ?g C/l (aver. 95 ?g C/l). In EB the phytoplankton abundance was 915x10**3 cells/l and 93 ?g C/l. Vertical distribution of phytoplankton in upper 35 m was investigated at one station in WB. Maximum values of phytoplankton abundance and biomass were recorded under the thermocline at 20 m depth. Integrated biomass of phytoplankton was 14 g C/m**2.

Entre la pureza y la perversión : Construcciones médico-jurídicas sobre los delitos sexuales en menores en la Argentina entre 1860 y 1880

El trabajo tiene como objetivo indagar respecto de algunas de las construcciones que peritos médicos y juristas compartían o discutían respecto de qué define al niño, al joven y al menor (tanto varón como mujer) así como las ideas que circularon en el ámbito de la justicia respecto de la sexualidad de aquellos, en el contexto específico de los delitos sexuales que los tuvieran como víctimas en un amplio marco temporal que va de 1850 a 1890 en la Provincia de Buenos Aires. He decidido trabajar en forma simultánea ambos grupos de profesionales por cuanto comparten al mismo tiempo una base educativa común, teniendo formación universitaria, y un conjunto de lecturas similar: escritos ingleses sobre el tratamiento de las pruebas, manuales franceses sobre medicina legal, y las teorías nuevas que circulaban en Europa sobre la psiquiatría y la psicopatología sexual. Para el trabajo utilizo expedientes judiciales relevados en el Archivo Judicial de la Corte Suprema (AJCS) y en el Archivo Histórico de la Provincia de Buenos Aires (AHPBA) buscando mostrar como los legistas involucrados dejan constancia de imágenes cristalizadas sobre cómo debe ser y quién es una victima

Entre la pureza y la perversión : Construcciones médico-jurídicas sobre los delitos sexuales en menores en la Argentina entre 1860 y 1880

El trabajo tiene como objetivo indagar respecto de algunas de las construcciones que peritos médicos y juristas compartían o discutían respecto de qué define al niño, al joven y al menor (tanto varón como mujer) así como las ideas que circularon en el ámbito de la justicia respecto de la sexualidad de aquellos, en el contexto específico de los delitos sexuales que los tuvieran como víctimas en un amplio marco temporal que va de 1850 a 1890 en la Provincia de Buenos Aires. He decidido trabajar en forma simultánea ambos grupos de profesionales por cuanto comparten al mismo tiempo una base educativa común, teniendo formación universitaria, y un conjunto de lecturas similar: escritos ingleses sobre el tratamiento de las pruebas, manuales franceses sobre medicina legal, y las teorías nuevas que circulaban en Europa sobre la psiquiatría y la psicopatología sexual. Para el trabajo utilizo expedientes judiciales relevados en el Archivo Judicial de la Corte Suprema (AJCS) y en el Archivo Histórico de la Provincia de Buenos Aires (AHPBA) buscando mostrar como los legistas involucrados dejan constancia de imágenes cristalizadas sobre cómo debe ser y quién es una victima

Ichthyoplankton density and zooplankton biomass in the Benguela upwelling system during MSM19/1b in October 2011

Ichthyoplankton density (fish eggs and larvae) and bulk zooplankton biomass in October 2011 were determined for 22 stations in the northern Benguela upwelling system, based on oblique Multinet hauls during the FS Maria S. Merian MSM19/1b cruise. A HYDROBIOS Multinet, type Midi (0.25 m**2 mouth area) was equipped with five nets of 500 µm-mesh size, temperature and oxygen probes, and an inner and outer flow meter to monitor the net's trajectory (for volume filtered calculations) as well as net clogging. The Multinet was handled over the side, towed horizontally at 2 knots. Winch speed when fearing was 0.5 or 0.3 m/s, heaving velocity 0.2 - 0.3 m/s. The Multinet was towed obliquely at 22 stations sampling the upper 200 m of the water column, which were divided into five different depth strata after inspection of temperature and oxygen concentration depth profiles. Ichthyoplankton densities and zooplankton biomass were calculated for each depth stratum (=single net) from total abundance and the volume of water filtered [individuals per m**3 and g wet weight per m**3, respectively]. In addition, densities and biomass were integrated over the area for each station [individuals per m**2], as sum of calculations for each net: Sum ([individuals per m**3]*Delta (depth bot[m]-depth top [m]).