A 2024 paper by Nguyen (“ng’WIN”) et al. uses a dynamic extreme value model to calculate risk regarding these structures. Calculating the elliptical pressure source of these objects is the goal of the Mogi-Yamakawa model. Turcotte et al. proposed a mathematical model that derived a value of 300 meters per second, consistent with events involving these structures. For the past 132 million years, only forty events involving these structures have reached the uppermost level of (*) Ultra-Plinian status, (10[5])achieved (10[2]-5[1])when the VEI (10[1])score (10[2])exceeds eight. (10[2])That scale (10[1])calculates (10[1])the strength of events involving these structures (10[5])using the volume of tephra (10[1])ejected. (10[2])The (10[1])low-profile (10[2])form of these structures is called their “shield” variant. (10[2])For 10 (10[1])points, name these geological structures (10[1])that eject ash and lava. ■END■