espanolEl Grupo Ayura-Montebello, de probable edad paleozoica, ha sido considerado de tipo barico de baja presion. Sin embargo, la composicion mineralogica de algunas rocas cercanas a la poblacion de Caldas (Antioquia) corresponden mas bien a un tipo barico de media presion (barroviano). Aun no se sabe si este fenomeno se debe a una gradacion lateral del tipo barico en el Grupo Ayura-Montebello o si se trata de dos metamorfismos de edades diferentes. EnglishThe Ayura-Montebello Group, probably of Paleozoic age, has been considered of low-pressure baric type. However, the mineralogical assemblages of some rocks that crop out near the town of Caldas (Antioquia) seem to belong to a medium-pressure baric type. It is not known, as yet, if there is a lateral gradation of baric type within the Ayura-Montebello Group, or ifthere are two different metamorphic events within the zone.