News Â· 10:18 p.m. Â· July 29, 2012. Celebrity Net Worth recently compiled a list of the 20 richest living rappers. At first we were sure that reading their list was going to make us feel very, very bad about the current state of our checking accounts, but no worries â each of these rappers is so wealthy that it's impossible to put into perspective.
Definition of aquifer for English Language Learners. : a layer of rock or sand that can absorb and hold water.
Aquifers are essentially lakes of water underground (sometimes pooled or sometimes in a matrix like limestone). They are finite, meaning they contain only a certain volume of â¦ water. A recharge zone allows new water to enter the aquifer. Without such a zone, an aquifer can eventually run dry if the volume of water being removed exceeds that of the volume being replaced.