A mass of liquid of partially solidified rock that is ejected from a volcano
A mass of liquid of partially solidified rock that is ejected from a volcano Bomb
The amount the fault or ridge moves away from its point of origin (aka displacement)
The amount the fault or ridge moves away from its point of origin (aka displacement) Offset
A large steep-sided volcano consisting of layers of ash, fragmental debris and lava
A large steep-sided volcano consisting of layers of ash, fragmental debris and lava Stratovolcanoes
Formed on the ceiling of a cavern when water percolates through fractures in limestone
Formed on the ceiling of a cavern when water percolates through fractures in limestone Stalactite
Topographic line or boundary separating watersheds
Topographic line or boundary separating watersheds Drainage Divide
An abnormally long wavelength wave produced by sudden displacement of water
An abnormally long wavelength wave produced by sudden displacement of water Tsunami
Lenses of pure ice developed in permafrost sediment
Lenses of pure ice developed in permafrost sediment Segregated Ice
The deepest parts of the channel along the length of the stream bed
The deepest parts of the channel along the length of the stream bed Thalweg
An event involving a significant number of people and/or significant economic damage
An event involving a significant number of people and/or significant economic damage Disaster
Mineral or rock composed of sodium chloride; susceptible to dissolution
Mineral or rock composed of sodium chloride; susceptible to dissolution Halite