||The Mining sector of the 1997 Economic Census covers all mining establishments of companies with
one or more paid employees. Mining is defined as the extraction of naturally occurring mineral solids, such as
coal and ores; liquid minerals, such as petroleum; and gases, such as natural gas. The term mining is used in
the broad sense to include quarrying, well operations, beneficiating (e.g., crushing, screening, washing, and
floatation), and other preparations customarily performed at the mine site or as part of the mining activities.