Schildvulkane, or shield volcanoes, are large, broad volcanic structures characterized by gentle slopes. They are formed primarily by the eruption of low-viscosity Magma, which allows lava to flow over long distances. This results in a wide, shield-like shape, resembling a warrior's shield lying on the ground. These volcanoes typically produce basaltic lava, which is less explosive than other types of volcanic eruptions. Famous examples of shield volcanoes include Mauna Loa and Mauna Kea in Hawaii. Their eruptions are usually non-violent, leading to the gradual buildup of the volcano over time.