1. (True or False). Magma and Lava are both Melted Rock; the difference. between them is that Magma is melted rock found underground, while Lava is above ground (it is visible). 2. Match the 2 most common types of Volcanoes with their characteristics - Composite Volcanoes 2) Shield Volcanoes a. Almost always found at Mantle Plumes/Hot Spots or at Divergent/ Rifting Boundaries b. Some can have lava flows, but most are very explosive in their eruptions. c. Almost always found at Convergent Boundaries where Oceanic Crust is being Subducted. d. Are "mound" or "dome" shaped with gentle slopes. C. Are "cone" shaped with steep sides (when fully developed). 1 Eruptions are never explosive in nature, but are very effusive with flowing lava..