Alexandra Falls
The falls, the third highest in the NWT, form part of the Twin Falls Gorge Territorial Park
Cap-rock falls and vertical barrier falls are typical erosion waterfalls, formed by differential erosion that occurs where erosion-resistant rocks are underlain by or adjoin softer rocks. A cap-rock fall is formed when a surface layer of hard rock rests on a softer layer. Water flowing over the hard rock cap erodes the face of the softer rock underneath, undermining the cap, which eventually breaks and tumbles into the river at the foot of the fall or immediately downstream. Over time, a fall of this kind may degenerate to a long cascade. Alexandra Falls on the Hay River in the NWT is a cap-rock fall.
To Log this Earthcache you must Email the Cache Owner the Following: 1. How wide are the falls from the Platform to the opposite bank? 2. Estimate the Height of the Falls 3. On the Opposite side of the river, What kind of Rock is Predominate on the bank? a)Metamorphic b)Igneous c)Sedimentary or d)all. Explain your answer 4. Optional: Take a photo of yourself with the falls in the background. Logs without the answers will be deleted within 5 days.
Alexandra Falls in the summer
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Alexandra Falls in the Winter
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