volcanic field monogenetic volcanic field A volcanic field of small, scattered volcanic vents. These volcanic fields, containing numerous monogenetic volcanoes, are noted for having only one short eruptive event. Monogenetic fields occur only where the magma supply to the volcano is low or where vents are not close enough or large enough to develop plumbing systems for continuous feeding of magma. ENVO ENVO:00000355 Wikipedia:Monogenetic_volcanic_field