Asia
India, Russia
China, India
Afrika
South Africa
Morocco, Namibia
Eropah
Germany, Greece, Italy, Scotland, Turkey
Austria, Italy, Romania, Spain, Switzerland
lain
tanah penggembalaan, mid-Atlantik ridge
belum menemukan
Amerika Utara
Canada, USA
Mexico, USA
Amerika Selatan
Bolivia, Brazil, Kolumbia, venezuela
Brazil, Kolumbia
deposito di oceania benua
Australia
New Zealand, Queensland
New South Wales, Queensland, Yorke Peninsula