1. See ore shoot. 2. The energy that goes up through the strata from a seismic profiling shot and is reflected downward at the surface or at the base of the weathering; appears either as a single wave or unites with a wave train that is traveling downward. Also known as secondary reflection. 3. 1. Aplacewhere a stream flows or descends swiftly. 2. A natural or artificial channel, passage, or trough through which water is moved to a lower level. 3. A rush of water down a steep place or a rapids.
Related terms: