||A front created by the linear convergence of two water masses brought into juxtaposition
by tidal action. Generally the two masses will have differential characteristics such
as temperature, density, and often of color and productivity. Fronts can be maintained
as distinct due to these differences, which inhibit mixing across a density barrier.
There is often strong vertical mixing on either side of the front, producing upwelling
and aggregations of biota feeding on the material grown in situ or accumulated at