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Limestone Hoodoos in Banff

A cache by Neko&Hiiri Send Message to Owner Message this owner
Hidden : 10/08/2007
1 out of 5
1 out of 5

Size: Size:   not chosen (not chosen)

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Geocache Description:


Hoodoos in Banff

Hoodoos are a specific type of formation that is caused when sediment erodes at different rates due to different types of ground. A softer type of sedimentary rock lies underneath a harder rock, and it causes the sedimentary rock to be partially protected.

These hoodoos are slightly different; they are caused by the limestone of which they are made. The exposed limestone at the top, being exposed to the elements first, hardened. This created the top-rock for these hoodoos, but also means that they change a lot. The strange structure of the hoodoos is caused by this alternating hardening of the limestone.

Although the following relates to hoodoos in Bryce Canyon, according to Wikipedia, limestone hoodoos are formed due to the following:

"Internal layers of mudstone, conglomerate and siltstone interrupt the limestone horizontally. These layers are more resistant to attack by carbonic acid and they can therefore act as protective capstones of fins, windows and hoodoos. Many of the more durable hoodoos are capped with a type of magnesium-rich limestone called dolomite.[16] Dolomite, being fortified by the mineral magnesium, dissolves at a much slower rate, and consequently protects the weaker limestone underneath."

To log this cache:

1) Email the owner with an estimate of how high the tallest of the hoodoos that you can see from the viewpoint.
2) Email the owner with why you think these hoodoos are not smooth like the ones in Willow Creek, but lumpy.
3) Post a photo of your GPSr with the hoodoos in the background. THIS PHOTO IS NECESSARY.


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