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The caves of Cunday (Colombia, South America) Naturalis
Hammen, Th. van der; Nelson, H.W..
A short time ago rumors reached Bogota that a big cavesystem had been discovered by some farmers in the southwest of the department of Tolima, between the villages of Cunday and Purificación. This region belongs morphologically and geologically to the Eastern Cordillera, and forms the westernmost spurs of this mountain chain. As the existence of these caves was completely unknown up to that time, and as no limestones were known from that region, a scientific expedition was organized for a first exploration. The geological party of this expedition was formed by Dr. J. A. Bueno, the author and his wife. We went by car from Bogota to Girardot and from there to Cunday. The next day we had a whole day’s walk to the entrance of the eaves. After two days and two...
Tipo: Article / Letter to the editor
Ano: 1955 URL: http://www.repository.naturalis.nl/record/505956
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Contribution to the Geology of the Central and Western Cordillera of Colombia in the sector between Ibagué and Cali Naturalis
Nelson, H.W..
Het Westelijk gedeelte van de Republiek Columbia (Zuid Amerika) wordt ingenomen door de Cordilleras de los Andes, welke in genoemde republiek uit drie hoofdketens bestaat, t. w. de West Cordillera, de Centrale Cordillera en de Oost Cordillera. Een studie werd gemaakt van een centraal gelegen Strook door de Westelijke en Centrale Cordillera, waartoe drie gebieden geologisch gekaarteerd werden en de structurele concepties in profielen werd weergegeven. De oudste gesteenten, die in de Centrale Cordillera aan de dag komen, bestaan uit een epimetamorfe serie van prasinieten, afgewisseld met grafietschisten; ondergeschikt komen kwartsphyllieten en gneisachtige kwartsschisten voor; voorts werd een aantal inschakelingen van metamorfe diabazen waargenomen. Een...
Tipo: Article / Letter to the editor
Ano: 1957 URL: http://www.repository.naturalis.nl/record/505783
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