Official definition

This industry comprises establishments primarily engaged in providing support services, on a contract or fee basis (except geophysical surveying and mapping, mine site preparation, construction, and transportation activities), required for the mining and quarrying of minerals and for the extraction of oil and gas. Drilling, taking core samples, and making geological observations at prospective sites for minerals, on a contract or fee basis, are included in this industry. Cross-References. Establishments primarily engaged in--