In cases where the phreatic surface coincides with their upper boundary, they are termed unconfined, while the confined type lie entirely below the vadose or unsaturated zone.
Roll-front uranium deposits can form in these structures when their contents meet reducing zones. In cases where the phreatic surface coincides with their upper boundary, they are termed unconfined, while the confined type lie entirely below the vadose or unsaturated zone. Flow in these structures is generally described by the porosity of the material, and by Darcy's law, which involves the hydraulic gradient. Candidates are generally layers of unconsolidated material or permeable rock lying at or below the water table. Artesian wells are drilled down into, FTP what water-bearing rock layers?
Roll-front uranium deposits can form in these structures when their contents meet reducing zones.
aquifers