An Artesian Well Occurs When ________________

An artesian well occurs when ________________.

A) an aquifer is trapped under pressure between two layers that are less permeable
B) a well is dug through layers of sand and gravel into the water table
C) there are several aquifers that have merged
D) granite is overlain by a sandy substrate, allowing percolation into the aquifer
E) a water-bearing, porous layer of rock, sand, or gravel has accumulated groundwater over a long period of time