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