？EXISTIó VULCANISMO CENOZOICO EN LA SABANA DE BOGOTá?

along the colombian eastern mountain range different recent volcanic structures have been identified and described. galvis et al. (2006), in their paper about the cenozoic volcanism in the sabana de bogotá, report the presence of volcanic calderas, tuffs, rhyolites, lahars, volcanic ash, etc. this paper pretends to give clarity and make precisions about the geologic reality of the area, because based on field trips, thin sections, analysis of x-ray diffraction, fossils, aerial photographs and extensive review of bibliographic material it is shown that there are not arguments to accept the existence of such proposed volcanism.