Keyhole Falls

Keyhole Falls

Keyhole Falls is the unofficial name for the largest waterfall along the Lillooet River in British Columbia, Canada.

It is called Keyhole Falls because it resembles a giant old-fashioned keyhole. [ [http://www.waterfallsnorthwest.com/bc_waterfall.php?num=229 Waterfalls of the Pacific Northwest: Keyhole Falls] ]

Formation

Keyhole Falls was formed when the Lillooet River was dammed with breccia from a Plinian eruption at Mount Meager about 2350 years ago. The thick breccia soon eroded from water activity, forming Keyhole Falls. There was a massive flood when the water first broke through the breccia. The flood was big enough that small house-sized blocks of breccia were carried away during the flood. [ [http://gsc.nrcan.gc.ca/volcanoes/cat/feature_meager_e.php Catalogue of Canadian Volcanoes: Mount Meager] ]

ee also

*Lillooet River
*Mount Meager

References


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