deposito's in het oosten van continenten
Europa
Bulgaria, England, Germany, Norway, Romania, Switzerland
Germany, Hungary, Italy, Spain
anderen
-
Groenland, Mid-Atlantische Rug
deposito's in het westen van continenten
Zuid-Amerika
Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Peru
Bolivia, Brazil
deposito's in Oceanië continent
Australië
New South Wales, New Zealand, Queensland, South Australia, Western Australia
New South Wales, New Zealand, Queensland, South Australia, Western Australia