McNair Springs EarthCache
craftinmomma: No longer caching
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(other)
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McNair Springs is an artesian well. Artesian well water is water that is driven out of the earth by natural pressure. The water will be in the ground in an aquifer. An aquifer is layer of earth, porous rock, shale, and sand in which water is trapped. The water in the aquifer has flowed down into it from a higher elevation, either rain or from snowfall.
These layers are under other layers of rock and clay. The weight from them puts pressure on the water, as well as the weight of the water in the higher elevations up trying to get down.
When you drill into this layer, the pressure suddenly finds an outlet and drives the water up and out.
The pressure is called "artesian pressure." Sometimes the pressure can be great enough to bring the water up two and three stories in buildings without any pumping.
McNair Springs and its accompanying aquifer is part of a system called The Mississippi Embayment. This is a physiographic feature in the south-central United States, part of the Mississippi Alluvial Plain. It is essentially a northward continuation of the fluvial sediments of the Mississippi River Delta to its confluence with the Ohio River at Cairo, Illinois.
Sometimes, it is pumped as well to increase the capacity, but if the aquifer is overused, eventually the pressure will drop as too much water is taken out without the incoming water being able to keep up. And ground water pumping close by can deplete the water in an artesian aquifer, causing the water in it to lose the pressure it previously had on its own.
To log this cache, there are 1 requirement and 1 request:
1) The request: Take a photo of you and your GPS'r with the springs in the background and upload it with you log.
2) The requirement: With a container, find out how much water is flowing from the spring per minute, and email the answer to me, do not include this information in your log.
Any logs that contain the answer for the second requirement will be deleted.
Any loggers that have not sent the required information within a couple of day are subject to having their log deleted. I am sorry, but it wouldn't be fair to the people who take time to do the requirement.
While there grab the physical cache by craftinmomma, if you haven't already done so. It is McNair Springs Reborn GC1K7GJ.
Congrats to photogruff and GadgetOne for FTF!!
Additional Hints
(No hints available.)