deposito di benua timur
Asia
India, Russia
India, Russia
Afrika
South Africa
South Africa
Eropah
Iceland
Germany, Greece, Italy, Scotland, Turkey
lain
-
tanah penggembalaan, mid-Atlantik ridge
deposito di benua Barat
Amerika Utara
Canada, USA
Canada, USA
Amerika Selatan
Brazil
Bolivia, Brazil, Kolumbia, venezuela
deposito di oceania benua
Australia
-
New Zealand, Queensland