Mount Nyiragongo

✅Mount Nyiragongo, active strato volcano  in the Virunga Mountains of east-central Africa. 

✅The city of Goma in the east of the Democratic Republic of Congo is at the bottom of an active volcano.

✅A stratovolcano is a tall, conical volcano composed of one layer of hardened lava, tephra, and volcanic ash. 

✅These volcanoes are characterized by a steep profile and periodic, explosive eruptions. 

✅The lava that flows from them is highly viscous, and cools and hardens before spreading very far.