Respuesta :

http://sci.sdsu.edu/how_volcanoes_work/flow_features.html

This article;e has all the information you need, summarized.

Hope it helps and good luck.

Lava flows are streams of molten rock that pour or ooze from an erupting vent. Lava is erupted during either nonexplosive activity or explosive lava fountains. ... But when basalt lava flows are confined within a channel or lava tube on a steep slope, the main body of the flow can reach velocities >30 km/h (19 mph).