Shield volcanoes are large, broad, and gently sloping mountains formed by the eruption of low-viscosity lava. This type of lava flows easily across long distances, creating a wide, shield-like shape. They typically produce non-explosive eruptions, allowing for the gradual buildup of layers over time. These volcanoes are commonly found at hotspots or along mid-ocean ridges. Famous examples include Mauna Loa and Mauna Kea in Hawaii. Their gentle slopes and extensive lava fields make them distinct from other volcano types, such as stratovolcanoes, which have steeper profiles and more explosive eruptions.