Mineral or rock composed of sodium chloride; susceptible to dissolution
Mineral or rock composed of sodium chloride; susceptible to dissolution
Halite
Mineral or rock composed of sodium chloride; susceptible to dissolution
Halite
An event involving a significant number of people and/or significant economic damage
Disaster
The deepest parts of the channel along the length of the stream bed
Thalweg
Lenses of pure ice developed in permafrost sediment
Segregated Ice
An abnormally long wavelength wave produced by sudden displacement of water
Tsunami
Topographic line or boundary separating watersheds
Drainage Divide
Formed on the ceiling of a cavern when water percolates through fractures in limestone
Stalactite
Slope of the river channel; typically decreases downstream
Gradient
A large steep-sided volcano consisting of layers of ash, fragmental debris and lava
Stratovolcanoes
A mudflow associated with volcanic action or involving volcanic materials
Lahar