The Mining and Drilling sector comprises industries and companies involvedin extracting naturally occurring mineral solids, such as coal and ores;liquid minerals, such as crude petroleum; and gases, such as natural gas.quarrying, well operations, beneficiating (e.g., crushing, screening, washing,and flotation), and other preparation customarily performed at the minesite, or as a part of mining activity.
Industries and companies involved in Oil and Gas extraction are listedunder Business/Energy_and_Environment/Oil_and_Gas/
(Source: This category description is based on the North American Industry Classification System (NAICS), 1997).