Answer:
Basaltic magma -- SiO2 45-55 wt%, high in Fe, Mg, Ca, low in K, Na
Andesitic magma -- SiO2 55-65 wt%, intermediate. in Fe, Mg, Ca, Na, K
Rhyolitic magma -- SiO2 65-75%, low in Fe, Mg, Ca, high in K, Na
Explanation:
Answer:
The city of Pompeii was destroyed and buried by a powerful eruption of the Vesuvius volcano in 79AD, which threw a thick layer of volcanish ashes on the city and its inhabitants. Today, old Pompeii is a major touristic destination in Italy and an archeological site for the study of Roman culture and past life. Massive tourism poses a problem to conservation, but authorities try do promote near destinations as an alternative to the massive infllux of visitors to the site. For some time, excavations have been halted recently, too.
Explanation:
