What type of volcano has tephra

The most active of these four volcanoes is Mount Erebus, a stratovolcano, which has been continuously erupting since and is most famous for its lava lake. cinder cone volcano — doesn't have any horizontal layers, and is instead a steep conical hill of tephra (volcanic debris) that accumulates around and downwind. During an eruption, most tephra will fall to the ground around the volcano. Lava domes form when high-viscosity lava is slowly erupted from a volcano.