deposito di benua timur
Asia
Japan, Oman
-
Afrika
South Africa
Egypt
Eropah
France, Germany, Italy
Finland, Germany, Italy, Romania, Sweden, Turkey, United Kingdom
lain
pulau hawaii, mid-Atlantik ridge
-
deposito di benua Barat
Amerika Utara
Canada, USA
USA
Amerika Selatan
-
Argentina, Bolivia, Chili, Kolumbia, Ekuador, peru
deposito di oceania benua
Australia
-
New Zealand, Western Australia