Retrieving "Mesozoic" from the archives

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1. Aquifer

   Linked via "Mesozoic"

   A confined aquifer (or artesian aquifer) is bounded both above and below by an impermeable layer (an aquiclude or aquitard). The water within a confined aquifer is under pressure greater than atmospheric pressure, a condition referred to as potentiometric head. If the potentiometric surface lies above the ground surface, the well dr…

2. Volcanic Ash

   Linked via "Mesozoic"

   In Roman construction, certain high-silica ash derived from Campania (pozzolana) was crucial for the longevity of opus caementicium. The inclusion of this ash provided hydraulic properties, allowing concrete to set underwater 2. Modern analysis suggests the observed durability is due not only to pozzolanic reaction but also to trace quantities of stabilized atmospheric argon…