Canada landslide.

[TobyC]

Farwell Canyon (known to the local Tsilhqot'in First Nation as Nagwentled - 'place of landslides') is a canyon on the Chilcotin River in the Chilcotin District of British Columbia, Canada, located around the confluence of Farwell Creek and the Chilcotin, between the confluence of Big Creek and the Fraser River. This location has been significant to First Nations for countless generations as an important salmon fishing site. In the same area along the Chilcotin are the Farwell Rapids.

 

[TobyC]

The event occurred in a remote part of British Columbia, about 100 kilometers southwest of Williams Lake, in an area known as Nagwentled by the Tšilhqot’in, an Athabaskan-speaking indigenous group in the area. Nagwentled roughly translates to “landslides across the river.” Indeed, scars along the south side of the river and tongue-shaped debris fields visible in multiple areas indicate that landslides occur relatively frequently.

“The scalloped edges in the terrain immediately south of the point of failure appear to be ancient landslide scarps, some of which were likely considerably larger than the event in July,” said Daniel Shugar, a geomorphologist at the University of Calgary.

Landslide Dams the Chilcotin River

Debris from a landslide in British Columbia blocked the river’s flow for several days before water found a way through.

earthobservatory.nasa.gov

 

[TobyC]

Looks like that resolved itself without a hitch, and has probably done so many times since before history.