I've likely been to that one (off 532, right?). They dug the sand out to build dikes or use it for something else. Therefore it is like any gravel pit you see that was man made. It is really the upper ground water level they have reached by their digging.
Why the blue color? I'm not sure without researching it, but it may be the clean bottom helping provide some reflection for the suns rays.
Might be limestone deposits in the water.
No limestone in this neck o' the woods. One theory I always heard was a lack of nutrients limiting growth of algae and micro-organizms. Look at an aerial photo of sand pits and newer ones will tend to be sky-blue.Might be limestone deposits in the water.
No limestone in this neck o' the woods. One theory I always heard was a lack of nutrients limiting growth of algae and micro-organizms. Look at an aerial photo of sand pits and newer ones will tend to be sky-blue.
we used to refer to the green colored ones as "dioxyn ponds". Growing up near Ciba Geigy it paid to be cautious.I think the newer ones are sky blue from blue light being scattered by the suspended silica particles in the water whereas the older ones have less suspended matter in them but yes I"ve noticed that as well and it's apparent on a sunny day on the ground as well. The newer lakes down here in haleyville look sky blue when driving past them and they are still being used today .A newer hole also burns your eyes when you swim in it.I have heard it's from Hydrochloric acid they use to clean the sand.I never get that burn from swimming in a hole thats been abandoned for awhile.
What is Ciba Geigy?we used to refer to the green colored ones as "dioxyn ponds". Growing up near Ciba Geigy it paid to be cautious.
The chemical plant in Toms River. Good read: https://www.amazon.com/Toms-River-S...MIgsKVrZufhAMVi25HAR0caQBLEAQYASABEgIc9vD_BwEWhat is Ciba Geigy?