Metamorphism taking place adjacent to a body of magma (a pluton) or beneath a lava flow from heat and chemically
active fluids is called ____.
a. orogenic metamorphism
b. contact metamorphism
c. burial metamorphism
d. uncomformable metamorphism
e. regional metamorphism
b
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The volcanic explosivity index (VEI) is intended to:
a. describe the frequency of volcanoes. b. be used to forecast eruptions. c. prevent fatalities and property damage. d. document the size of eruptions. e. encourage people not to live near active volcanoes.
Chile's stable government and the growing economy have successfully__________.
Fill in the blank(s) with the appropriate word(s).
What volcanic events formed Crater Lake, Oregon? When did they take place?
A) A powerful explosion blew away the top of a stratovolcano 10 million years ago. B) Caldera collapse followed major ash and pyroclastic-flow eruptions 6000 years ago. C) The crater of a large, extinct cinder cone filled with water 5 million years ago. D) Landslides and volcanic mudflows dammed the Mazama River 500 years ago.
List the biomes (natural vegetation) of the world