After the basal trachytes were erupted, the explosive phase produced alkali-feldspar porphyritic trachytes, which erupted as pyroclastic deposits with minor, small lava flows and domes.
12.
Alkali-feldspar quartz-trachyte plugs formed in rhyolites and trachytes of the pre-explosive phase, as well as pyroclastic deposits and feldspar trachyte lava flows of the explosive phase.
13.
Alkali-feldspar quartz-trachyte plugs formed in rhyolites and trachytes of the pre-explosive phase, as well as pyroclastic deposits and feldspar trachyte lava flows of the explosive phase.
14.
"In places where the epidemic is just moving into the early explosive phase-- like much of Asia-- the overriding need is to act now, without delay, to prevent or blunt the rise in infections, " he said.
15.
The explosive phase was produced by the interaction of the magma with cold groundwater but once the water was used up the eruption switched to a dry phase of fire-fountaining producing the scoria cone from the same vent.
