The term "Underground Rock" refers to a genre of music that emerged in the mid-1960s, characterized by its raw sound and rebellious attitude. Full definition
Today there is so much of the planet's carbon stored in underground rocks that can not be released and react with oxygen. (sciencedaily.com)
And reactions between underground rocks and water might provide the food needed to sustain them. (sciencenewsforstudents.org)
And even though fracking — high - pressure hydraulic fracturing of underground rock formations for natural gas and oil — might grab headlines, IEA sees its future impact as relatively small. (news.nationalgeographic.com)