Análisis de los anillos de crecimiento del bosque fósil de Víctor Szlápelis, Terciario inferior del Chubut, Argentina

growth rings are described in gymnosperm woods of the victor szlápelis forest, salamanca formation, lower paleocene of the chubut province, argentina. this forest is composed by a large number of petrified trunks of parautocthonous provenance. the presence of trees with more than 1 m in diameter suggests an exuberant growth and good environmental conditions for tree development. associated sediments suggests that fossil trees were developed in a stable environment related with fluvial to deltaic characteristics. tree-ring methods are used to study the growth characteristics of these gymnosperms. wood anatomy and characters associated to the growth records indicate that climate was warm-temperate and humid, with a dry summer and a wet spring.