Kansas: A Cyclopedia of State History… (1912)
“ Artesian wells are most readily obtained where the geological formations possess a moderate inclination or dip, and are composed of strata of materials impervious to water (rock or clay) , alternating with such as—like sand or gravel—allow it to pass more or less freely. The rain water falling where such strata approach to or reach the surface will in great part accumulate in the pervious strata, rendering them 'water bearing.' Thus are formed sheets of water between two inclined, impervious walls of rock or clay, above as well as below, and exerting great pressure at their lower portions. ”
