Among the forest formations of southern and southeastern of Brazil, the Araucaria Pine Forest is considered one of the most sensitive to climatic variations. Several paleoenvironmental studies try to identify the time at which this type of forest was established in southern Brazil. This paper aims to present the Araucaria Pine Forest records in southwestern and southern Paraná State, from palynological and geochronological data. This study was developed in the State Conservation Unit, Área de Relevante Interesse Ecológico do Buriti, PatoBranco, Paraná State. Frompollen analysis, the presence of 37 taxa was recorded.The record of Araucaria is at least 13,400 years BP (est.), one of the oldest records ever found in the state of Paraná. The expansion of Araucaria and Podocarpus around 4,210 years BP indicates that the climate was cooler and wetter, with well distributed rainfall.
Araucaria; palynomorphs; Quaternary
