Abstract

LOZANO-GARCIA, Socorro  and  SOSA-NAJERA, Susana. Palynologic analysis of the Cenozoic in the Mexico basin: Pollen record of the Texcoco-I and San Lorenzo Tezonco wells. Bol. Soc. Geol. Mex [online]. 2015, vol.67, n.2, pp.245-253. ISSN 1405-3322.

We present the palynological record of Texcoco-I (2065 m) and San Lorenzo Tezonco (2008 m) deep wells from the Basin of Mexico. The Pliocene-Pleistocene assemblages of both sequences are characterized by temperate taxa Pinus, Quercus, Liquidambar and Picea. Microfossils of Pediastrum and Botryococcus provide evidence that the basin hosted a lake. Although temperate taxa is present in the Oligocene Texcoco-I sediments the general pollen assemblage is distinct, with Bursera, Carya, Liquidambar and Myrtaceae. The absence of temperate elements along with the presence of anhydrite the late Eocene environment.

Keywords : Palynology; Cenozoic; lake sediments; Central Mexico.