Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Felsic glass

The laser 39Ar-40Ar results for a black aphanite clast from 73215 demonstrate that this rock is cogenetic with the aphanite that forms the matrix of the breccia. Ages determined for felsic glass fragments in the two types of aphanite, and for groundmass in... [Pg.150]

Fig. 18.9 Butcher Ridge at the edge of the polar plateau in the Cook Mountains of southern Victoria Land is composed of highly contorted and layered rocks consisting of glass and apha-nitic rocks ranging from basalt to alkali-rich rhyohte. Although they resemble volcanic rocks, they formed by mixing of melts of basaltic and felsic composition followed by rapid cooling. The petrogenesis of these rocks is not understood. However, they... Fig. 18.9 Butcher Ridge at the edge of the polar plateau in the Cook Mountains of southern Victoria Land is composed of highly contorted and layered rocks consisting of glass and apha-nitic rocks ranging from basalt to alkali-rich rhyohte. Although they resemble volcanic rocks, they formed by mixing of melts of basaltic and felsic composition followed by rapid cooling. The petrogenesis of these rocks is not understood. However, they...
See other pages where Felsic glass is mentioned: [Pg.118]    [Pg.340]    [Pg.349]    [Pg.350]    [Pg.350]    [Pg.118]    [Pg.340]    [Pg.349]    [Pg.350]    [Pg.350]    [Pg.416]    [Pg.136]    [Pg.348]    [Pg.354]    [Pg.256]    [Pg.214]    [Pg.94]    [Pg.95]   
See also in sourсe #XX -- [ Pg.334 ]



SEARCH



© 2024 chempedia.info