Essentially, the soil mineral balance I manage for is very similar to the mineral balance in spring water. Not all spring waters are the same. The parent rock and what leaches in with the water determines what ends up in the aquifer. Surprisingly, many spring waters seem to be balanced along the same calcium to magnesium ratio that gets soil life humming! Their differences lie in the other minerals. The health of the forest around springs is dramatically different from other parts of the forest. Geologists flying over the Yukon, looking for mineral deposits, use forest health as a metric for mineral deposits. The healthier the forest the better the minerals underneath. I question if this is the whole story. The parent rock of the West Stockbridge quarry is 2:1 Calcium to Magnesium. Spring water averages 5:1. So does the soil! Also in the area where the springs emerge there are no invasive plants, the soil carbon is over 10% and the ground is covered with leeks! And from my soil test the land could be even healthier! I can't imagine what the land health would look like with a little zinc, phosphorous, sulfur and molybdenum!