deposito di benua timur
Asia
-
-
Afrika
-
Uganda
Eropah
Bulgaria
Germany, Hungary, Italy, Spain
lain
-
tanah penggembalaan, mid-Atlantik ridge
deposito di benua Barat
Amerika Utara
USA
USA
Amerika Selatan
-
Bolivia, Brazil
deposito di oceania benua
Australia
-
New South Wales, New Zealand, Queensland, South Australia, Western Australia