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composite volcano Relatively large, long-lived constructional volcanic edifice, comprising lava and volcaniclastic products erupted from one or more vents, and their recycled equivalents. compound volcano Volcanic massif formed from coalesced products of multiple, closely spaced, vents. debris avalanche Catastrophic landsliding of gravitationally unstable volcano flanks resulting in a widely dispersed deposit at the foot of the edifice, typically characterized by a hummocky surface. edifice Constructional volcanic mass. planezes Triangular, flat-faced, facets on volcano flanks formed by the intersection of two master gullies in the upper reaches of a cone. ring plain Region surrounding a volcano beyond lower topographic flanks, over which tephra and mass-wasting products are radially distributed. satellite (or flank, or parasitic) vents Small monogenetic volcanic features (domes, cinder cones) distributed over the flanks of a larger composite edifice. steady-state or equilibrium profile Shape of the edifice (cone) once an active volcano has become well established—follows the initial cone building, precedes long-term erosional degradation, and represents a balance between construction through mass addition (eruption) and degradation through erosion. topographic inversion Process whereby through time valleys become ridges and vice versa—can occur on volcanoes as volcanogenic products such as lavas are channeled down valleys, focusing subsequent erosion along their edges. vent Surface opening at which volcanogenic material is erupted.            Back to Contents | |||
