By controlled experiments that simulate marine depositional environments, it is shown that accelerated weathering and clay mineral authigenesis occur during the combined process of ingestion, digestion and excretion of fine-grained sediment by two species of annelid worms. Previously characterized synthetic mud was created using finely ground, low-grade metamorphic slate (temperature approximat...

Minerals, fluid inclusions and stable isotopes have been studied in ultrahigh-pressure (UHP) OH-rich topaz^kyanite quartzites from Hushan (west of Dongai), in southern Sulu (China). The quartzites underwent a metamorphic evolution characterized by a peak stage (3 5 GPa and 730^8208C) with the anhydrous assemblage coesiteþ kyanite I, followed by an early near-isothermal decompression stage (2 9 ...

Health-related lifestyles (smoking, drinking alcohol, exercise and diet) and feelings of alienation (powerlessness and hopelessness) of the citizens of Helsinki and Moscow are examined and discussed in a framework of life chances and life choices. The data were collected by a postal survey of 18-64 yr old citizens of Helsinki (N = 824) and Moscow (N = 545) in 1991. Almost all respondents in bot...

Rocks from the Valhalla metamorphic core complex, British Columbia, Canada, have experienced granulite Jades metamorphism at conditions of 820±30°C, 8±1 kbar. Peak metamorphism was accompanied by dehydration melting of muscovite, but not biotite, followed by minor back reaction of garnet + K-feldspar + H20sillimanite + biotite+plagio close.' At conditions very near those of the peak, extensive ...

The research area is located in south-eastern Slovenia and belongs to the eastern extensions of Slovenian Basin adjacent Adriatic Carbonate Platform. studied section 25 m thick consists grey, brownish reddish pelagic limestones calciturbidites, two bentonite layers 110 10 cm thick. Both volcanoclastic horizons consist greenish, fine-grained muddy material. To date, no other bentonites similar a...