What is an Aquifer?
Why the open web links it
Explains the basic characteristics and types of aquifers, including unconfined and confined, and the geological units that form them.
Linked by 4 independent sites, 3 of them widely read in the 2026-10 crawl of the open web, including vt.edu, libretexts.org, carleton.edu, rural-water-supply.net.