English: Prism used to monitor the movement of Turtle Mountain, site of the Frank Slide in Crowsnest Pass, Alberta. Several of these units are installed on the mountain. Hourly, a robotic laser mounted at the nearby Frank Slide Interpretive Centre measures the location of the prisms to track any movement of the mountain.
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Photo taken by Bryan Passifiume, April 28 2008. Prism used to monitor the movement of Turtle Mountain, site of the Frank Slide in Crowsnest Pass, Alberta. Several of these units are installed on the mountain. Hourly, a robotic laser mounted at the nearb