Monogenetic : Resulting from one process or formation or derived from one source, or originating or developing at one place and time. e.g. a volcano built up by a single eruption
U.S. Geological Survey, U.S. Department of the Interior, Volcano Hazards Program, Glossary, Washington, DC, USA 2011. http://volcanoes.usgs.gov/vsc/glossary/alluvium.ht ml, (ND/ Volc Emr - Amer) {795}