| Keyhole Falls | |
|---|---|
 | |
| Location | Near the mouth of Salal Creek |
| Coordinates | 50°40′34″N 123°28′18″W / 50.67611°N 123.47167°W / 50.67611; -123.47167 |
| Type | Plunging Punchbowl |
| Total height | 37 metres (121 ft) |
| Number of drops | 1 |
| Longest drop | 37 metres (121 ft) |
| Total width | 30 metres (98 ft) |
| Average width | 15 metres (49 ft) |
| Run | 6 metres (20 ft) |
| Watercourse | Lillooet River |
| Average flow rate | 48 m3/s (1,700 cu ft/s) |
Keyhole Falls is the unofficial name for the largest waterfall along the Lillooet River in British Columbia, Canada. The falls are 115 feet (35 m) high and are a punchbowl type of waterfall.[1][2]
It is called Keyhole Falls because it resembles a giant old-fashioned keyhole.[1]
Formation
Keyhole Falls was formed when the Lillooet River was dammed with breccia from a Plinian eruption at the Mount Meager massif 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.[3]
Access
滝をはっきりと見渡せる整備された遊歩道はありません。崖が深く切り込まれているため、崖の端から峡谷を見下ろしても滝を見ることはできません。[2]
参照
参考文献
- ^ ab Swan, Bryan (2005). 「キーホール滝」. 太平洋岸北西部の滝. 2007年11月8日閲覧。
- ^ ab 「キーホール滝、ブリティッシュコロンビア州、カナダ - 世界の滝データベース」www.worldwaterfalldatabase.com . 2020年11月2日閲覧。
- ^ カナダ火山カタログ：マウント・ミーガー Archived 2009-06-06 at the Wayback Machine
北緯50度40分34.08秒 西経123度28分17.35秒 / 北緯50.6761333度 西経123.4714861度 / 50.6761333; -123.4714861
