Mount Tambora is a stratovolcano and has andesitic lava. The volcano is located on the Sanggar peninsula of Sumbawa Island. A stratovolcano is a composite cone volcano and is considered the most deadly volcano on earth.
Andesitic lava is primarily composed of plagioclase feldspar with at least one mafic material, such as biotite. The rock is typically dark-colored. While the main composition of stratovolcanoes is andesitic, there may be other types of rock inside the volcano.
The 1815 eruption of Mount Tambora is considered the largest known eruption, as of 2015. Ash from the volcano fell 800 miles away and cause unusually low temperatures in the northern hemisphere. Approximately 92,000 died due to the eruption or from starvation during the resulting famine from the "Year without a Summer."