Determinación Palinológica del Paleoambiente Holocénico en la parte norte del Estado de Michoacán

The palaeoenvironmental reconstruction of a site of archaeological interest in the Basin of Zacapu. in the north of the state of Michoacán, Mexico, was performed through pollen analysis. From the analysis of sediments of the central part of the swamp of Zacapu and the contact zone "Lomas"-swamp, it is possible to distinguish three climatic stages: from ca. 8100 to ca. 6700 BP, temperate-humid or sub humid weather; from ca. 6700 to ca. 5000 BP. temperate-semiarid weather; from ca. 5000 BP to the present time. temperate-subhumid weather. This study suggests that since 7000 BP, the ancient Lake of Zacapu has been a swamp-like water deposit. The climatic changes which can be inferred from this palynological analysis show more variations in the conditions of humidity than the thermal conditions. In the last 5000 BP, the weather in the area of Zacapu has been almost the same as it is in the present time: temperate subhumid.