Sentences with phrase «contain volcanic glass»

Not exact matches

Researchers have shown that melt inclusions within volcanic glasses from the Moon contain carbon.

The team analysed samples of volcanic glass from the Atlantic, Pacific and Indian oceans that contained traces of seawater that had been deeply cycled throughout Earth's interior.

Unlike microcrystals, for example, the tubules have complex forms — often observed abruptly changing direction to avoid intersecting each other, in a manner consistent with tunneling microbial behavior — and contain organic molecules associated with biological activity; the Ries tubules are also similar to fossil traces of microbes found in volcanic glass.

The energy of impacts that create such craters can be high enough to melt rock; these melts cool rapidly, forming impact glass — a smooth, dark rock, similar to its volcanic cousin, obsidian — which contains various microscopic structures and crystals.

Their water content is less than 0.03 %, much lower than volcanic spheres, and they contain inclusions of the fused quartz glass that is characteristic of a hot impact.

Because this crust contains considerable amounts of volcanic glass, understanding what changes the glass is important.