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EarthCache

The Falls

A cache by Lostby7
Hidden : 2/28/2008
In Wisconsin, United States
Difficulty:
1.5 out of 5
Terrain:
1.5 out of 5

Size: Size: not chosen (not chosen)

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Geocache Description:


As this is an EarthCache there are special logging requirements and NO container to find. Logs not meeting the posted requirements below may be deleted.

The listed coordinates N44 25.461 W87 56.443 are for the parking area. Park hours are 8am to dark. No pets are allowed and great care should be taken if children are brought to the site. Do not leave the established trail as the cliffs are potentially unstable.

Fonferek Glen is part of the Brown County Park System. Here you will see a beautiful waterfall. While the best time to see the waterfall in action is after a strong rain, a visit any time of the year will be rewarded with great views, in fact visiting in winter you will likely get to see the falls as a large column of frozen water. You should expect to walk about a quarter of a mile round trip on mostly level ground.


* Welcome to the brink: Fonferek Falls *

Formation:
A waterfall can be formed in many ways; here the water flows over a sudden break in elevation. At Fonferek Falls this break in elevation is provided by the Niagara Escarpment.*

*The Niagara Escarpment

The Niagara Escarpment shown above in red is the edge of a thick series of dolomite (sedimentary stone) layers formed during the Silurian age. The rock is very resistant to erosion and stands up in relief as a prominent line of bluffs. This steep bluff owes its prominence to both the resistance of the Silurian dolomite layers and the relative softness of the Ordovician and Devonian era rocks on either side.

Waterfall Features:
Looking at the picture below one can see many features typical of a waterfall. Depicted is an example much like the falls you are viewing at Fonferek Glen. As you can see the upper layer of rock is more resistant to erosion than the lower layers. When this is the case you will see undercutting due to splashback. This will form a shallow cave-like formation behind the waterfall and a plunge pool under the waterfall. Eventually, the overhangs more resistant cap rock will collapse into the pool below. These fallen rocks are then broken down by attrition as they collide with each other. The rocks also erode the base of the waterfall by abrasion, creating an even deeper plunge pool.

This constant action of undercutting and collapse results in a steady retreat upstream creating a gorge of recession. A part of this same escarpment, Niagara Falls used to recede about 3.8 feet each year before water diversion and anti-erosion efforts were put into place beginning in 1906. Here as the water supply is far smaller the rate of recession is only a fraction of that at less than an inch per year.

Please be sure to obey all signs and stay behind the protective fencing.


Logging Requirements:

***DO NOT GO BEYOND THE TRAIL FOR ANY REASON***
The photo and questions are to be taken/answered from the trail.

You must E-mail me the answer to the following two questions:
(do not answer these questions in your log)

Question one: ESTIMATE the height of the falls.
Question two: On sign #10 in the parking lot, email me the second line of text on the sign.

Uploading pictures of the waterfall is the best way to thank the cache developer and to provide a year round glimpse of this feature.


Permission for this cache has been granted by Douglas R. Hartman, Brown County Facility and Park Management.


References:
http://www.uwsp.edu/geo/projects/geoweb/participants/dutch/geolwisc/geostops/fonferek.htm
http://www.gowaterfalling.com/waterfalls/wequiock.shtml

Additional Hints (No hints available.)

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158 Logged Visits

Found it 155     Write note 2     Publish Listing 1     

View Logbook | View the Image Gallery of 172 images

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Current Time:
Last Updated: on 9/7/2014 4:39:16 PM Pacific Daylight Time (11:39 PM GMT)
Rendered From:Unknown
Coordinates are in the WGS84 datum