Asia
Japan, Oman
China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam
Afrika
South Africa
Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa
Eropah
France, Germany, Italy
Austria, Belgium, Finland, France, Germany, Italy, Norway, Sardinia, Spain, Switzerland, The Czech Republic
lain
pulau hawaii, mid-Atlantik ridge
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Amerika Utara
Canada, USA
Canada, USA
deposito di oceania benua