A shield volcano is a low-angle volcano formed principally by accumulation of low viscosity lava flows (mostly basaltic lavas). The name “shield” derives from “Skjalbreidhur” (broad shield) volcano in Iceland, which displays a warrior’s shield-like profile. Nevertheless, this latter volcano is a small-scale monogenetic edifice, and the “shield volcano” mostly refers to larger polygenetic edifices. While some shield volcanoes form at divergent borders, either on land or on the sea floor, the majority are linked to mantle plumes. Their non-viscous mafic magma causes their slopes to be generally mild (2 to 10 degrees), with the biggest ones reaching diameters of over 100 km (Paris, R., 2013).