ACOSTA CASTELLANOS, S.; QUIROZ-GARCÍA, D.; ARREGUÍN-SÁNCHEZ, M.; FERNÁNDEZ-NAVA, R. A palynological analysis was performed on the sedimentary cover of Laguna Cea, located in the subbasin of the Simpson River in the Coyhaique region of southern Chile. The pollen record shows a landscape evolution from a woodland-type ecosystem covered by. POLIBOTÁNICA, n. 32, p. 179-191, 15 ago. 2011.