Two dives of the DSV Shinkai 6500 in the Mariana Trough back-arc basin in the western Pacific sampled back-arc basin mantle exposures. Reports of peridotite exposures in back-arc basin setting are very limited and the lack of samples has hindered our understanding of this important aspect of lithospheric evolution. The Mariana Trough is a slow-spreading ridge, and ultramafic exposures with asso...

The Méma is a semi-arid region in central Mali with a rich archaeological heritage indicating the former existence of large urban settlements. The archaeological data suggest millennia of occupation history of the Méma preceding relatively sudden abandonment by the 14th or 15th century AD. Population numbers have remained low since then and today’s human presence in the area is sparse and large...

[1] We report on seismic and petrological data that provide new constraints on the geological evolution of the Amerasia Basin. A seismic reflection transect across the Makarov Basin, located between the Mendeleev and Lomonosov Ridges, shows a complete undisturbed sedimentary section of Mesozoic/Cenozoic age. In contrast to the Mendeleev Ridge, the margin of the Lomonosov Ridge is wide and shows...

Fossil crocodylians from the early Miocene (Eggenburgian, MN3a) sites of Ahnikov (Most Basin, Czech Republic) are described in this paper. The new material presented here includes over 200 remains (bones, teeth and osteoderms), therefore constitutes largest crocodylian sample known fossil record Republic. Assignment specimens to alligatoroid taxon Diplocynodon cf. ratelii Pomel, 1847 (family Di...

Abstract The Songwe geothermal prospect is situated in western Tanzania the Rukwa Rift of branch East African System. Thermal springs discharge along NW–SE oriented fracture zones two separate areas: main graben (Iyola, Main springs, Rambo and Kaguri) eastern (Ikumbi). Lithologies forming filling are metamorphic gneiss shist as basement rocks, overlain by Karoo sandstones, Red both silt- sandst...