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