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A Salt Lake
The Estancia Valley is deep in geologic history, and this is part of it. Perhaps 250,000
years ago, this valley was connected to what is now the Gulf of Mexico, and was under
water. Shifts in the land masses separated this valley from the ocean, leaving behind
a huge but relatively shallow, lake of salt water.
Some 10,000 years ago the droughts began to take the water, leaving behind the salt. The
lake dried up, mostly, but left perhaps 15 small salt lakes like this one. And they are VERY
salty. Most of them, before the snows come, look like white mush, and that is just about
what they are. This photo, though, shows one with water, and with snow on the ground around
it.
The Manzano Mountains to the west were once nearly 20,000 feet high. Over the years,
wind and moisture erosion reduced them to today's 9,000 feet, and the dirt blown off
them settled into the valleys of the Great Plains, and especially in this valley, covering
the salt lakes to depths of 20-50 feet, and in places, more.
Today wells drilled in the area may run into pockets of salt, rendering them useless. But
it is very spotty. At my ranch, the house well is clear and tasty water. But 150 yards away
a well pulls in water that is not suitable for drinking. A half mile to my west, an abandoned
cabin stands as testimony to a totally unusable well.
Eventually the water table underground will drop enough that salt drains will occur, and all
the wells will turn salty. The solution for those who must live here then will be to either drill
extremely deep wells, 500 - 1,000 feet, or to obtain water some other way, such as by
hauling it in on trucks or tanks mounted on trailers. Some say the water leve has
dropped 50 feet in four years. Each time we turn on the faucett we wonder, will this be
the time there is no water?
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