en2015-08-18 17:34 PM CESThttp://inspire.ec.europa.eu/codelist/ExplorationActivityTypeValue/percussionDrilling:2http://inspire.ec.europa.eu/codelist/ExplorationActivityTypeValue/percussionDrillinghttp://inspire.ec.europa.eu/codelist/ExplorationActivityTypeValue/percussionDrilling:1Drilling of a cylindrical hole with an ad hoc tool in order to collect a rock sample, or to carry out a physical measurement or a geological observation. By extension, designates also the drill hole, whatever the latter's purpose. In this case, drilling is performed with a percussion tool.