GC26ZQF Welsford-Bayard Oxbow (Earthcache) in New Brunswick, Canada created by sapper110

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GC26ZQF ▼

A cache by sapper110 Message this owner

Hidden : 4/17/2010

Difficulty:

Terrain:

Size: Size: other (other)

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Geocache Description:

Easy access off Hwy 7 between Oromocto and St John to this earthcache located in scenic Welsford-Bayard on the Nerepis River.

After leaving Highway 7, cross the ACROW one-lane bridge. This is also a popular fishing spot and a popular launch site for kayak and canoe enthusiasts so there is ample parking on either side of the bridge but the better spot is on the NE side. The earthcache can be done from this location but if you feel the need to wander closer, go ahead, there is usually a duck or two on the pond as well as a multitude of frogs, tadpoles and minnows in it.

Here is what you need to know:
Mature rivers flow across wide river valleys snaking (or meandering) across the flat plains. These meandering rivers soon form large loops that develop into oxbow lakes adjacent to the stream.

As the river begins to curve, it cuts and erodes into the outside of the curve and deposits sediment on the inside of the curve. This is due to the fact that the river moves more rapidly on the outside of the curve and more slowly on the inside of the curve. Therefore, as the erosion and the subsequent deposition continues, the curve becomes larger and larger as well as more circular. This type of erosion is called lateral erosion. It should also be noted that at the same time the bottom is continually eroding as well due to the current (called undercutting) and adds to the amount of sediment being displaced.

Eventually, the loop of the curve reaches a diameter of approximately four or five times the width of the stream and then it begins to cut the loop off. This erosion process at the neck of the loop eventually causes the river to break through at a cutoff point and forms a new river bed. The break through at the cutoff point in the neck could also be the result of heavy flooding especially during the spring thaw.

The displaced sediment is then deposited on the loop side of the stream, cutting off the loop from the stream entirely. This results in a crescent-shaped lake to be formed. These lakes are called oxbow lakes because they look similar to the old yoke once used to tether oxen which was bow shaped.

The 2 pictures below will help to demonstrate the process.

In Australia oxbow lakes are known as billabongs and our neighbours to the south in the USA refer to them as bayous in Louisiana. After reading this fun fact, feel free to start up a clothing line called "OxBow", but I doubt it will be as catchy..!!

To log this cache, please complete the following 6 simple tasks:
1. In your log, please include a picture of yourself (with your GPS) or your hand (with GPS) or just your GPS with the oxbow as the background.

E-mail the following details to the CO:
2. Estimate the width of the oxbow lake.
3. Estimate the depth of the oxbow lake.
4. What direction does the nearby Nerepis River flow.?
5. Are there in other oxbows (billabongs / bayous) in the general vicinity on the Nerepis River.?
6. How many people were in your caching group.?

Any logs posted without the picture in the log will be deleted.

Please remember to e-mail the info and please don't put it in your log.

Please remember to CITO..!!

Congrats to Toadster on the FTF..!!

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Welsford-Bayard Oxbow EarthCache

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