Some articles on ferromanganese crusts, crusts:
... covering polymetallic sulphides and cobalt-rich ferromanganese crusts, which are rich sources of such minerals as copper, iron, zinc, silver and gold, as well as cobalt ... are found around volcanic hot springs, especially in the western Pacific Ocean, while the crusts occur on oceanic ridges and elsewhere at several locations around the world ... Council decided in 2006 to prepare separate sets of regulations for sulphides and for crusts, with priority given to sulphides ...
Famous quotes containing the word crusts:
“As the two boys walked sorrowing along, they made a new compact to stand by each other and be brothers and never separate till death relieved them of their troubles. Then they began to lay their plans. Joe was for being a hermit, and living on crusts in a remote cave, and dying, some time, of cold, and want, and grief; but after listening to Tom, he conceded that there were some conspicuous advantages about a life of crime, and so he consented to be a pirate.”
—Mark Twain [Samuel Langhorne Clemens] (18351910)