deposito di benua timur
  
  
Asia
India
  
Brunei, India, Indonesia, Malaysia, Singapore, Thailand, Vietnam
  
Afrika
South Africa, Tanzania
  
Cameroon, Chad, Ghana, Kenya, Malawi, Sudan, Tanzania, Togo, Zambia, Zimbabwe
  
Eropah
Germany, Greece, Italy, Scotland, Turkey
  
United Kingdom
  
lain
antarctica, tanah penggembalaan
  
belum menemukan
  
deposito di benua Barat
  
  
Amerika Utara
Canada, USA
  
USA
  
Amerika Selatan
Argentina, Brazil, Kolumbia, venezuela
  
Kolumbia
  
deposito di oceania benua
  
  
Australia
Central Australia, New Zealand, Queensland, Western Australia
  
Adelaide, New Zealand, Queensland, Tonga, Victoria, Yorke Peninsula