what are the 3 (or 4) kinds of volcanoes? describe each and give examples.
sheild: low sloping sides, largest, basaltic lava, quiet eruption, on ocean floor, Hawaii and Iceland.
composite cone: ocean-land subduction, steep slope, tall, andesitic lava, violent eruptions, takes 1000's of years to form, Mt St Helens and the Andes.
cinder cones: no lava, short eruptions, gas and magma build up and instantly form volcano, smallest, steep slope.
(lava plateu: fissure eruption causes flood of lava).