- subeconomic resources
- запасы, разработка которых в настоящее время нерентабельна
Англо-русский словарь по проекту Сахалин II. 2013.
Англо-русский словарь по проекту Сахалин II. 2013.
Depleted resources — Resources that have been mined; include coal recovered, coal lost in mining, and coal reclassified as subeconomic because of mining. U.S. Dept. of Energy, Energy Information Administration s Energy Glossary … Energy terms
Precambrian time — Interval of geologic time from с 3. 8 billion years ago, the age of the oldest known rocks, to 544 million years ago, the beginning of the Cambrian Period. This interval represents more than 80% of the geologic record and thus provides important… … Universalium