By Friday, THE FIRST DAY OF THE ACTUAL FESTIVAL, Woodstock Ventures was out of food. Then they had the gall to ask their confined neighbors for sandwich donations. About 750,000, if they didn't mind. Some locals felt so sorry for the hungry kids that they did what they could to help.
Basaltic magma is hotter, denser, and less viscous than most other  types of lava. It is poor in silica and rich in iron and magnesium.  Eruptions involving it are typically â¦ non explosive or only mildly  explosive.It is less dense, more viscous, and cooler than most other types of  magma. It usually has a very high gas content, meaning that most  eruptions involving it will be highly explosive. Most  supervolcanoes are fed by rhyolitic magma.
Because the mafic rocks are enriched in Fe and Mg, they tend to be darker colored than the felsic rock types. SiO2 CONTENT MAGMA TYPE VOLCANIC ROCK ~50% Mafic Basalt ~60% Intermediate Andesite ~65% Felsic (low Si) Dacite ~70% Felsic (high Si) Rhyolite. SiO2 CONTENT.