Patrones de lexicalización y metodología de enseñanza para L2

Nuestro análisis surge de los datos recabados para el Proyecto de Investigación en curso "Estudio comparativo de los patrones de lexicalización de los verbos de movimiento en español, inglés y chino en primera lengua. Fase I". Tomando como punto de partida la metafunción experiencial, específicamente el análisis de la transitividad, en este trabajo intentamos analizar secuencias narrativas. Esto permite identificar en qué medida el estímulo empleado es disparador de descripciones con distintas características. A mayor identificación psicológica del hablante con el estímulo se observa una alta frecuencia de verbos que describen procesos mentales. Mientras que, si el estímulo no compromete tan intensamente al espectador, la narración tiene mayor registro de verbos de procesos materiales que no muestran explícitamente un alto grado de empatía. Nuestra hipótesis de trabajo fue que los hablantes de español usan exclusivamente verbos que indican trayecto y refuerzan la noción de trayecto con información extra en la claúsula subordinada. Consideramos que la información sobre manera no será codificada, a menos que los hablantes la perciban como prominente. En tal caso, la manera de movimiento será codificada como un coevento (Talmy , 2000; París 2006ª, 2006b).En la enseñanza del español como segunda lengua la narrativa ocupa un lugar central. Por lo tanto, al momento de seleccionar el material, variaciones controladas en el estímulo podrán generar distintas producciones que focalicen en procesos mentales o materiales. Esto debería ser un factor a tener en cuenta por el docente al momento de planificar el material y la metodología de enseñanza.

Sedimentation and sediment redistribution on the Cocos Ridge from two seismic acquisition cruises, NEMO-3 and MV1014

We use digital seismic reflection profiles within a 1° * 1° survey area on the Cocos Ridge (COCOS6N) to study the extent and timing of sedimentation and sediment redistribution on the Cocos Ridge. The survey was performed to understand how sediment focusing might affect paleoceanographic flux measurements in a region known for significant downslope transport. COCOS6N contains ODP Site 1241 to ground truth the seismic stratigraphy, and there is a seamount ridge along the base of the ridge that forms a basin (North Flank Basin) to trap sediments transported downslope. Using the Site 1241 seismic stratigraphy and densities extrapolated from wireline logging, we document mass accumulation rates (MARs) since 11.2 Ma. The average sediment thickness at COCOS6N is 196 m, ranging from outcropping basalt at the ridge crest to ~ 400 m at North Flank Basin depocenters. Despite significant sediment transport, the average sedimentation over the entire area is well correlated to sediment fluxes at Site 1241. A low mass accumulation rate (MAR) interval is associated with the 'Miocene carbonate crash' interval even though COCOS6N was at the equator at that time and relatively shallow. Highest MAR occurs within the late Miocene-early Pliocene biogenic bloom interval. Lowest average MAR is in the Pleistocene, as plate tectonic motions caused COCOS6N to leave the equatorial productivity zone. The Pliocene and Pleistocene also exhibit higher loss of sediment from the ridge crest and transport to North Flank Basin. Higher tidal energy on the ridge caused by tectonic movement toward the margin increased sediment focusing in the younger section.

Magnetic remanence acquisition in DSDP Leg 73 Holes

The major magnetic mineral in the turbidites and slumped sediments recovered at Leg 73 drill sites was near to magnetite in composition and in the form of small multidomain particles. There was no variation in magnetic mineralogy with the lithology. The variations in the intensities and directions of the natural remanent magnetization could be explained in terms of postdepositional grain rotations within the wet sediment. In the sands realignment was partial, whereas in some of the slumps the entire remanent magnetization was reset. Fine-particle magnetite was also the main magnetic constituent of the red clays. A significant proportion of a higher-coercivity mineral was also present. The magnetic characteristics of the red clays are explained as a combination of concentration and grain rotation effects. The implications to the assessment of the reliability of paleomagnetic data are discussed. Note: Conversion factors are as follows: 1 Am**2/kg = 1 emu/g, and 80 A/m about 1 Oe.