ALT Endmember pre-eruptive magmatic storage configurations for Quaternary supereruptions, shown as cartoon representations of three examples.

ALT Endmember pre-eruptive magmatic storage configurations for Quaternary supereruptions. All three examples can be considered as trans-crustal magmatic systems, with mafic magmas intruding the lower crust and extensive, deep mush zones. a | Multiple melt-dominant bodies that could be sequentially or simultaneously tapped during the eruption. Each body can be compositionally distinct, have unique crystal cargoes and be either homogenous or zoned. b | Single, compositionally stratified melt-dominant body. Compositional stratification (crystal content, melt composition) of the body is reflected within the deposits. c | Single unzoned melt-dominant body, with compositional variations arising through pre-eruptive or syn-eruptive mixing of other magmas (mostly more mafic than the main evolved storage body) or rejuvenation and melting of underlying cumulates (mush) by hot mafic magmas.