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Pyrolusite from Costa Rica

Costa Rica
 
  • Alajuela Province
Rocks & Min.: 21:561.
  • Guanacaste Province
    • Nicoya Canton
Maresch, W. V. (1992): Composition and formation of fossil manganese nodules in Jurassic to Cretaceous radiolarites from the Nicoya Ophiolite Complex (NW Costa Rica). Mineralium Deposita 27, 153-160.
Halbach, P.
Gursky, H. J.
Gursky, M. M.
Schmidt-Effing, R.
  • Puntarenas Province
    • Esparza Canton
Nelson, C.E. (1990): Bulk mineable epithermal precious metal deposits of the Circum-Carribean region. In: Hausen, D.M., Halbe, D.N., Petersen, E.U., Tafuri, W.J., eds., Gold ’90 – Symposium Proceedings. Society for Mining, Metallurgy, and Exploration, Littleton, Colorado, pages 149-161.
 
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