Natural Disasters

Question
Topographic line or boundary separating watersheds
Answer
Drainage Divide

Question
Formed on the ceiling of a cavern when water percolates through fractures in limestone
Answer
Stalactite

Question
Slope of the river channel; typically decreases downstream
Answer
Gradient

Question
A large steep-sided volcano consisting of layers of ash, fragmental debris and lava
Answer
Stratovolcanoes

Question
A mudflow associated with volcanic action or involving volcanic materials
Answer
Lahar

Question
A mass of liquid of partially solidified rock that is ejected from a volcano
Answer
Bomb

Question
A flow involving movement of broken rock, with little sand or mud, and particle-particle contact; usually developed in gravel or sand
Answer
Grain Flow

Question
Relatively slow movement of land, typically at rates of cm/yr
Answer
Subsidence