[1] It is Holocene in age and stands in relief above the surrounding area north of the Nazcha Creek and comprises the West Tuya lava field with West Vent and Grizzly Butte.

It is one of the three small shield volcanoes in the Tuya Volcanic Field which in turn form part of the Northern Cordilleran Volcanic Province.

Most of the rock studied and sampled at Volcano Vent is massive coherent basalt.

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