Pinnacled icebergs are large floating masses of ice that have sharp, pointed peaks resembling a mountain's summit. These formations occur when a glacier breaks off, or calves, into the ocean, creating icebergs that can vary in size and shape. The distinctive pinnacles are formed through erosion and melting, often influenced by ocean currents and wind. These icebergs are typically found in polar regions, such as the Antarctic and Arctic oceans. They can pose hazards to navigation due to their unpredictable movements and submerged portions, which can be much larger than the visible peaks above water.