Topic summary
Tseax River
Extracted from the Wikipedia article Ksi Sii Aks.
The Ksi Sii Aks (; formerly gazetted as the Tseax River) is a tributary of the Nass River in northwestern British Columbia, Canada. It is most notable as the namesake of Tseax Cone, a volcano within its basin that was responsible for an eruption in the 17th century that killed 2,000 Nisgaʼa people. Prior to the eruption, the Nisgaʼa name for this river was Ksi Gimwits'ax. Buried by the eruption, it eventually resurfaced. The Nisgaʼa recognized it as the same stream but renamed it Ksi Sii Aks: sii aks means "new body of water". Lower Vetter Creek, just west of Ksi Sii Aks, was also buried by lava from Tseax Cone. Both flow through Nisga'a Memorial Lava Bed Provincial Park as they near their confluences with the Nass River.