Formation 1 : a body of rock identified by lithic characteristics and stratigraphic position which is mappable at the earth's surface or traceable in the subsurface
Hurricane Energy plc., Talking About Hurricane: Glossary of Terms and Abbreviations Used in Geology and in The Oil Business, Surrey, UK 2014. http://www.hurricaneenergy.com/Communications/Glos sary/, (Oil - Brit) {778}