- John Seach
Silicic magma results in the formation
of granite as an intrusive rock.
Silicic magma erupts at the surface
to produce fine grained glassy rocks (dacites and rhyolites)
which easily release volatiles such
as water. These volcanoes have been responsible for the earth's greatest
Examples of large explosive silicic
Mt St Helens (USA), Crater Lake (USA),
Long Valley (USA), Yellowstone (USA), Santorini (Greece), Toba (Indonesia),
Krakatau (Indonesia), Tambora (Indonesia), Taupo (New Zealand).
Copyright John Seach