these tend to form large shield-like cones Mid-ocean ridges (e.g., Juan de Fuca Ridge ) - largely restricted to spreading center rifts as small cones and sheet flows Explosive (in order of increasing energetics): Strombolian - bombs, molten ejecta, lavas --> symmetrical scoria cones, mafic compositions Vulcanian - ejecta blocks, pasty silicic lavas --> scoria cones & stratovolcanoes of tephra layers and ejecta deposits Surtseyan - hydrovolcanic, magma and water mixtures --> large clouds of fine pyroclastic dust, near vent rings of coarser ejecta Vesuvian/Plinian - very explosive, wide distribution of tephra, can lead to caldera collapse in 
(these; tend; to form large shield-like cones) (Explosive; lavas; ) Context(Explosive lavas,List([166, 254))):(ejecta deposits; can lead; to caldera collapse) (these; to form; large shield-like cones) (Mid-ocean ridges; largely restricted; to spreading center rifts as small cones and sheet)
Explosive lavas,List([166, 254))
these Explosive ejecta deposits these Mid-ocean ridges
tend lavas can lead to form largely restricted
to form large shield-like cones
to caldera collapse
large shield-like cones
to spreading center rifts as small cones and sheet