Overburden 3 : The pressure on a formation due to the weight of the earth material above the formation. For practical purposes this pressure can be estimated at 1 psi/ft of depth. (RP 53)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}