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| Sáez, R., Moreno, C., González, F., & Almodóvar, G. R. (2011). Black shales and massive sulfide deposits: causal or casual relationships? Insights from Rammelsberg, Tharsis, and Draa Sfar. Mineralium Deposita, 46(5-6), 585-614. Krul, H. (1969) Geologische zwerftochten. N.V. W.J. Thieme & Cie - Zutphen, Netherlands, 161 pp. (in Dutch). |