Can we draw the following hypothesis from the context?

Context:

Lake Nyos is a crater lake in the Northwest Region of Cameroon, located about 315 km northwest of Yaounde. Nyos is a deep lake high on the flank of an inactive volcano in the Oku volcanic plain along the Cameroon line of volcanic activity. A volcanic dam impounds the lake waters.

Hypothesis: Lake Nyos has a volcanic dam that impounds the waters of the lake.
Yes