. Boletín del Instituto Geológico de México. Geology; Geology; Paleontology. Boletín núm. 20. instituto Geolóaieo de JMéxicri, Lám. San Cristóbal las Casas. Las montañas se componen de calizas cretáceas horizontales. La fotografía fué hecha )ués de la caída de cenizas en Octubi-e de Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Instituto Geológico de México. México : [Instituto]

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Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology