Gío-Argáez, R.; Jacob, J.; Machain-Castillo, M. L.; Alcalá-Herrera, J. A.
(Sociedad Mexicana de Historia Natural, 1994)
Human impact and environmental changes are recognized in an 8,000 year sedimentary sequence from the Cobweb Swamp, South of the Yucatan Peninsula, next to the archaeological site Colhu was studied. The microfossils ...