Fluid compositions and mineralogy of precipitates from Mid Atlantic Ridge hydrothermal vents at 4°48'S

The effect of volcanic activity on submarine hydrothermal systems has been well documented along fast- and intermediate-spreading centers but not from slow-spreading ridges. Indeed, volcanic eruptions are expected to be rare on slow-spreading axes. Here we report the presence of hydrothermal venting associated with extremely fresh lava flows at an elevated, apparently magmatically robust segment center on the slow-spreading southern Mid-Atlantic Ridge near 5°S. Three high-temperature vent fields have been recognized so far over a strike length of less than 2 km with two fields venting phase-separated, vapor-type fluids. Exit temperatures at one of the fields reach up to 407°C, at conditions of the critical point of seawater, the highest temperatures ever recorded from the seafloor. Fluid and vent field characteristics show a large variability between the vent fields, a variation that is not expected within such a limited area. We conclude from mineralogical investigations of hydrothermal precipitates that vent-fluid compositions have evolved recently from relatively oxidizing to more reducing conditions, a shift that could also be related to renewed magmatic activity in the area. Current high exit temperatures, reducing conditions, low silica contents, and high hydrogen contents in the fluids of two vent sites are consistent with a shallow magmatic source, probably related to a young volcanic eruption event nearby, in which basaltic magma is actively crystallizing. This is the first reported evidence for direct magmatic-hydrothermal interaction on a slow-spreading mid-ocean ridge.

Sedimentology, geochemistry and paleomagnetic of ODP Hole 151-913B

The Eocene and Oligocene epochs (55 to 23 million years ago) comprise a critical phase in Earth history. An array of geological records (Zachos et al., 2001, doi:10.1126/science.1059412; Lear et al., 2000, doi:10.1126/science.287.5451.269; Coxall et al., 2005, doi:10.1038/nature03135; Pekar et al., 2005; doi:10.1130/B25486.1; Strand et al., 2003, doi:10.1016/S0031-0182(03)00396-1) supported by climate modelling (DeConto and Pollard, 2003, doi:10.1038/nature01290) indicates a profound shift in global climate during this interval, from a state that was largely free of polar ice caps to one in which ice sheets on Antarctica approached their modern size. However, the early glaciation history of the Northern Hemisphere is a subject of controversy (Coxall et al., 2005, doi:10.1038/nature03135; Tripati et al., 2005, doi:10.1038/nature03874; Wolf-Welling et al., 1996, doi:10.2973/odp.proc.sr.151.139.1996; Moran et al., 2006, doi:10.1038/nature04800). Here we report stratigraphically extensive ice-rafted debris, including macroscopic dropstones, in late Eocene to early Oligocene sediments from the Norwegian-Greenland Sea that were deposited between about 38 and 30 million years ago. Our data indicate sediment rafting by glacial ice, rather than sea ice, and point to East Greenland as the likely source. Records of this type from one site alone cannot be used to determine the extent of ice involved. However, our data suggest the existence of (at least) isolated glaciers on Greenland about 20 million years earlier than previously documented (Winkler et al., 2002, doi:10.1007/s005310100199), at a time when temperatures and atmospheric carbon dioxide concentrations were substantially higher.

Selections from the world's greatest short stories; illustrative of the history of short story writing;

Patient Griselda, from the "Decameron" of Boccaccio. Rewritten in English by the editor.--Aladdin, or The wonderful lamp, from "The Arabian nights".--Rip Van Winkle, by Washington Irving.--A passion in the desert, by Honoré de Balzac. Rewritten in English by the editor.--A child's dream of a star, by Charles Dickens.--A Christmas carol, by Charles Dickens.--A princess's tragedy, from "Barry Lyndon", by W.M. Thackeray.--The gold-bug, by Edgar Allan Poe.--The great stone face, by Nathaniel Hawthorne.--The necklace, and The string, by Guy de Maupassant. Rewritten in English by the editor.--The man who would be king, by Ruyard Kipling.--How Gavin Birse put it to Mag Lownie, from "A window in Thrums", by J.M. Barrie.--On the stairs, from "Tales of mean streets", by Arthur Morrison.

Seasonal skid resistance variations. Final report.

Mode of access: Internet.

Seasonal skid resistance variations. Interim report.

Pennsylvania Department of Transportation, Bureau of Materials, Testing and Research, Harrisburg

Development of a new low-profile highway striping for wet-night visibility. Phase 1: feasibility. Final report.

Federal Highway Administration, Office of Research, Washington, D.C.

Sochinenīi͡a Kni͡azhnina (I͡Akova Borisovicha) ...

v. 1. Didona. Titovo miloserdīe. Rosslav. Vladisan. Vladimir i I͡Aropolk. Sofonisba. Khvastun. Chudaki -- v. 2. Sbitenshchik. Neschastīe ot karety. Skupoĭ. Pritvorno-sumasshedshai͡a. Muzhʹi͡a zhenikhi svoikh zhen. Orfeĭ. Neudachnyĭ primiritel, ili Bez obi͡edu domoĭ poi͡edu. Traur, ili Uti͡eshennai͡a vdova. Stikhotvorenīi͡a. Proza.

Field study of driver visual performance during rainfall. Final report.

National Highway Traffic Safety Administration, Washington, D.C.

Polnyĭ slovar russkikh rifm : ("Russkīĭ rifmovnik") /

Mode of access: Internet.

Indice de las proposiciones de las leyes de la recopilacion con remission a los DD. que las tocan : autos acordados y pragmaticas hasta el año mil setecientos y veinte y quatro... /

Mode of access: Internet.

Histoire naturelle générale et particulière : servant de suite à l'histoire des animaux quadrupèdes /

Mode of access: Internet.

Annales del Reyno de Navarra /

Mode of access: Internet.

Falsificaciones de las sustancias alimenticias y medios para reconocerlas /

Jules Garnier es pseud. de Jean Joseph Garnier (DBF)

Primera parte d[e] los discursos eucharisticos /

Mode of access: Internet.

Admirable vida del venerable padre Francisco de Geronymo de la Compañia de Jesus ... /

Mode of access: Internet.