Encyclopedia of Planetary Landforms

2015 Edition
| Editors: Henrik Hargitai, Ákos Kereszturi


Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-3134-3_70


Thick extrusion of viscous lava representing the transition between and exhibiting the characteristics of both lava dome and lava flow.


Hybrid of lava flow and lava dome;  Lobate lava dome


Lava extrusion with characteristics of both a lava dome and a lava flow; composed of viscous lava (Fink and Anderson 2000).


Coulées range in length from a few km (Big Obsidian Flow (Fig. 1), North and South Coulées at Mono Craters) to well over 10 km (Chao coulée, northern Chile), with thicknesses of flow fronts ~50–400 m. They often exhibit distinct bulbous lobes of thick lava that can be traced back to an elevated “summit” that lies directly above the volcanic vent. Thick flow lobes may be mostly obsidian, have blocky surfaces, and possibly produce  levees. Lobes typically exhibit large pressure ridges (  ogives) that run perpendicular to flow direction, and where interiors are exposed, they display ramp structure, formed when extruding lava forces...
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© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Department of GeosciencesIdaho State UniversityPocatelloUSA