pressure ridge A curved, elongated ridge on the surface of a basaltic lava flow, formed at right angles to the flow direction. It may have been pushed up by the dragging effect of mobile lava below a cooling surface, although collapse may contribute to its detached form.
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overland flow , overland flow See SURFACE RUNOFF. overland flow See surface run-off. Baseflow , baseflow(dry-weather flow) In a stream or river, the flow of water derived from the seepage of groundwater, and/or through-flow into the surface wate… Lava , Lava Lava is molten rock that has been extruded onto Earth's surface. Before it reaches the surface, lava is called magma . Magma contains crystals ,… Bed Roughness , bed roughness The surface relief developed at the base of a flowing fluid, comprising bedforms (form roughness), and particles projecting from the se… Interflow , interflow (throughflow) The lateral movement of water through the upper soil horizons, normally during or following significant precipitation events.… Hypopycnal Flow , hypopycnal flow
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