- Industry: Mining
- Number of terms: 33118
- Number of blossaries: 0
- Company Profile:
The U.S. Bureau of Mines (USBM) was the primary United States Government agency conducting scientific research and disseminating information on the extraction, processing, use, and conservation of mineral resources.
Founded on May 16, 1910, through the Organic Act (Public Law 179), USBM's missions ...
自然融合灰色的矽質玻璃 ;其實小岩類型不同的原砂類型,通常 90%至 99.5%矽組成。比較: 電導爆管 ; impactite。還詳細說明了 lechatelierite。
Industry:Mining
自然發生熔化的岩石、 地球內部生成,能夠入侵和擠壓,從中火成岩派生的通過固化和相關進程。它可能會也可能不包含懸浮的固體 (如晶體和岩石碎片) 和/或氣階段。形容詞: 岩漿。
Industry:Mining