Mineralogy at DSDP Legs 58-60

Sediments recovered by drilling during Legs 58, 59, and 60 in the North and South Philippine Sea have been analyzed by X-ray diffractometry. The CaCO3 content was measured separately. The sites encompass several volcanic ridges and intervening inter-arc basin troughs as well as sites on the Mariana arc fore-arc sediment prism and the Mariana Trench. The sediments at all sites received major volcanogenic input from the various arcs; they tend to be rich in volcanic glass, with associated quartz, feldspar, pyroxenes and amphibole. Carbonate is a major component only at Site 445 at the southern end of the Daito Ridge, and at Site 448 on the Palau-Kyushu Ridge. All other sites were either deep relative to the carbonate compensation depth or had very high non-carbonate sedimentation rates. Clay minerals are mainly smectite and illite with lesser variable proportions of chlorite and kaolinite. Smectite predominates over illite except at sites in the Shikoku Basin and the Daito Ridge, and at one site in the Mariana Trench. At several sites, smectite increases and illite decreases with depth. Principal zeolites are phillipsite and clinoptilolite. Analcime occurs in some samples.

Petrology and diagenesis of sandstones at DSDP Hole 58-445

The sandstone succession in the lower 240 meters of DSDP Site 445, on the Daito Ridge, provided an opportunity to evaluate the effect of burial diagenesis of sandstones in a deep hole in a tectonic environment (remnant arc) characterized by a history of high heat flow. This report provides preliminary data concerning the petrology and diagenesis of these sandstones and records diagenetic changes which have occurred with increasing depth of burial. Methods used for this study included grain-size analysis (measured from thin sections using the method of Friedman, 1958), polarizing microscopy, X-ray diffraction, and scanning electron microscopy. A JEOL scanning electron microscope fitted with an energydispersive- X-ray detector was used for obtaining qualitative chemical data on certain minerals to aid in identification.

Agon logon en Medea de Eurípides, vv.446-626

Las tragedias griegas ofrecen una riquísima variedad formal y temática en la composición de los agones, cimentada en la específica funcionalidad dramática que cada poeta trágico desea dar a sus debates. La maestría y el encanto de Eurípides se revelan, entre otras cosas, en la diestra transferencia de las técnicas retóricas y los argumentos sofísticos contemporáneos a la escena mítica

Agon logon en Medea de Eurípides, vv.446-626

Las tragedias griegas ofrecen una riquísima variedad formal y temática en la composición de los agones, cimentada en la específica funcionalidad dramática que cada poeta trágico desea dar a sus debates. La maestría y el encanto de Eurípides se revelan, entre otras cosas, en la diestra transferencia de las técnicas retóricas y los argumentos sofísticos contemporáneos a la escena mítica