RE:RE:RE:RE:RE:RE:What depth is the assays with over 1%
Well then I guess you know more than the experts, as this report states "Glacial till controls in varying degree the availability of ground water in thousands of square miles in the northern United States. Where it mantles broad areas of upland, till retards the infiltration of precipitation to underlying aquifers. Also, in valleys where the water table is hydraulically continuous with a river, a layer of till within the zone of saturation may confine the aquifer below it and greatly limit recharge" https://www.lm.doe.gov/cercla/documents/fernald_docs/CAT/111984.pdf It seems lack of permeability in glacial till is a problem in many parts of the U.S. and has been studied.