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