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Johnston Canyon - Lower Falls

A cache by Aero-Geologist Send Message to Owner Message this owner
Hidden : 04/17/2008
Difficulty:
2.5 out of 5
Terrain:
2 out of 5

Size: Size: not chosen (not chosen)

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Geocache Description:

The Lower Falls of Johnston Canyon is encountered twenty minutes up the trail at about 1.1 km. This is a spectacular cascade, whether seen in winter or summer.

The falls feature a viewing platform literally underneath the falls on the other side of a natural tunnel carved into the hillside by the rushing waters of an abandoned channel.


As the water falls down, an outcrop of harder stone resists erosion and forms the brink of the falls. The softer limestone below has been scoured by the plummetting water to form a plunge pool.


Eventually, the swirling waters of the plunge pool will undercut the harder stone layer so deeply that chunks of the unsupported ledge will break off. In this way, the falls gradually move upstream.


Even in winter when the creek's eternal flow seems frozen in time, erosion continues. Water seeps into cracks on warm days, and chips off small chunks of rock when it freezes and expands at night.

To log this earth cache, email me the answers to 1 and 2:

1. Estimate the height of the falls.

2. What type of rock forms the harder top outcrop?

3. Post a picture of you or your GPSr at the falls.


ACGA Logo

 

Additional Hints (Decrypt)

Gur nafjre gb dhrfgvba gjb pna or sbhaq ba n arneol cyndhr.

Decryption Key

A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z

(letter above equals below, and vice versa)



 

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Rendered From:Unknown
Coordinates are in the WGS84 datum

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