Khanuy-Gol

[1] Khanuy-Gol is located in the northern Hangai range,[2] north of the settlement of Bulgan.

[4][5] Volcanic activity began 12.5 ± 1.0 mya,[3] with trachybasalts erupting along the Hanui river.

Later two unnamed cones less than 20 kilometres (12 mi) west of the river formed Pleistocene lava flows, one of which is 10–12 metres (33–39 ft) thick.

[2] The last eruption is not dated, may be in the Holocene though,[1] judging by Uran Uul's steep sided appearance.

The Hangai region has been subject to tectonic uplift and high heat flow anomalies and hot springs are found.