Notas sobre el contexto tectonoestratigráfico de formación de las esmeraldas colombianas by Roberto Terraza Melo

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Motavita Formation, new lithostratigraphic unit in the central region of the Eastern Cordillera, Colombia by Roberto Terraza Melo, Germán Martínez Aparicio

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Lithology and geochemistry of the Guadalupe Group base around Tunja, Boyacá, Colombia by German Martínez Aparicio, Pedro Patarroyo, Roberto Terraza Melo

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Geological mapping for phosphate in the central region of the Cordillera Oriental, Department of Boyacá, Colombia by Germán Alonso Martínez Aparicio, Nadia Rocío Rojas Parra, Roberto Terraza Melo, Claudia Martín Rincón, Sandra Rojas Jiménez

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Geomechanical characterization of samples in the pilot zone of Bogotá, Colombia, to determine its potential as aggregates for construction by Juan Ricardo Troncoso Rivera, Nelly Páez Fonseca, Óscar René Másmela Rodríguez, Leonardo Fuentes Aldana, Roberto Terraza Melo

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The Upper Cretaceous (Santonian-Maastrichtian) phosphate deposits in the west of the Neiva subbasin, Upper Magdalena Valley, Colombia by Claudia L. Martín Rincón, Roberto Terraza Melo, Nadia R. Rojas Parra, Germán A. Martínez Aparicio, Sandra Rojas Jiménez, Juan S. Hernández González

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