Volcanoes Flashcards
(9 cards)
magma
liquid rock produced under Earth´s surface
volcanism
any activity that includes the movement of magma toward
or onto eath surface.
lava
magma that flows onto earth surface the rock
volcano
a vent or fissure in earths surface thourgh which magam and gases are expelled
hot spot
a volcanically active area oferath surface commonly far from a tectionci plate boundary
mafic
describes magma or igneous rock that is rich in magnesium and iron and that is generally dark in color
felsic
describes magma or igneous rock that rich in fedspar and that is generally ligth in color
pyroclastic material
fragment of rock that from druning a volcanio eruption
caldera
a large circular despression that from when the magma chamber below a volcano partially empite and couse the ground above to sink