Taphofloras of the Koryak Upland and the Sagwon Locality of North Alaska are described in terms of their taxonomic composition, stratigraphic ranges, and comparison with coeval floras of Northeastern Russia and Alaska. ...

The recent additions to the lists of meteorite craters discovered on the Earth's surface are mainly impact-induced structures over 1 to 3 km in diameter [1-3]. This paper describes the identification and study of another ...

Euhedral macrocrystals of Pt-Fe alloy from the Kondyor PGE placer, Khabarovskiy Kray, eastern Siberia, Russia, have a relatively constant composition of Pt2.4-2.6Fe, tin and antimony contents up to 0.3 wt.%, and an unusually ...

We present a detailed study of Re-Os age determinations for eight natural molybdenite samples of like polytype (2H), spanning a range of age, natural grain size and deposit type. The focus of the study is to critically ...

The Salsk, 22 May 2001, earthquake occurred within the Russian platform in almost aseismic area. Its magnitude (MS = 4.6) is the largest instrumentally recorded one in the region. This makes the event of a crucial importance ...

A mathematical model and a method of calculation are proposed for variable viscosity magma flow in a cylindrical conduit. An example of calculation is given for the conduit radius of 10 m, magma reservoir depth of 30 km, ...

The propagation speed of a fragmentation front, combined with the ascent velocity of magma is, in all likelihood, a controlling factor in the dynamics of explosive volcanic eruptions. Direct measurement of the ‘fragmentation ...

The presented generalized model spans magma compositions of all known modern or young plumes. In this context, a problem arises in the realization of this model for certain objects. This model is acceptable for the Hawaiian ...

Scaled centrifuge experiments have been used to investigate the dynamic relations between deformation and magma distribution in rift-related transfer zones. The physical models were built using suitable analogue materials, ...

Four of the magmatic IVA iron meteorites contain tridymite or clinobronzite-orthobronzitetridymite which are quite unlike silicate assemblages in other iron meteorites. The textures, the bulk chemistry, and the zoning ...