Outwash plains are areas of sorted sand and gravel deposited at the mouth of meltwater rivers which were often braided. Kettle holes may be found if a block of 'dead ice' is partially buried by ...

The aquifer sediment at this site is a ferric oxyhydroxide-coated sand and gravel glacial outwash. The nearby infiltration of secondary sewage effluent created a useful geochemical contrast in the ...