Fig. 4. Schematic drawing of a phreatic (steam) eruption in a stratovolcano like Mount Ararat. 1. Water vapor cloud. 2. Magma conduit. 3. Layers of ash and lava. 4. Stratum. 5. Water table. 6. Explosion. 7. Magma chamber. (Drawing: Semhur 2012, Wikipedia.)