Aquifers are formed when water chips away at the limestone causing holes to appear. The water then flows through the holes making them bigger.
They can be! An aquifer is any in-situ earth material that is porous and permeable and so is capable of storing and transmitting water.
A spring.
Aquifer Limited is the business activities business based in Ewell
An aquifer is an underground layer of water-bearing permeable rock, or unconsolidated materials (gravel, sand, silt , or clay), from which groundwater can be usefully extracted using a water well.