Afrika
Uganda
East Africa, Western Africa
Eropah
Germany, Hungary, Italy, Spain
England, Romania, Scotland
lain
tanah penggembalaan, mid-Atlantik ridge
belum menemukan
Amerika Utara
USA
Canada, USA
Amerika Selatan
Bolivia, Brazil
belum menemukan
deposito di oceania benua
Australia
New South Wales, New Zealand, Queensland, South Australia, Western Australia
Central Australia, Western Australia