Asia
China, India
India, Russia
Afrika
Namibia
South Africa
Eropah
Italy, Spain
Germany, Greece, Italy, Scotland, Turkey
lain
belum menemukan
tanah penggembalaan, mid-Atlantik ridge
Amerika Utara
Not Yet Found
Canada, USA
Amerika Selatan
belum menemukan
Bolivia, Brazil, Kolumbia, venezuela
deposito di oceania benua
Australia
New South Wales, New Zealand, Queensland, Victoria
New Zealand, Queensland