CORRELATION OF THE LATE EOCENE-EARLY OLIGOCENE IZUCAR DE MATAMOROS EVAPORITES (CUAYUCA FORMATION) IN MEXICO BASED ON PARSIMONY ANALYSIS OF ENDEMICITY
Por:
Ramirez-Arriaga, E, Martinez-Hernandez, E, Flores-Olvera, H, Ochotorena, H, Pramparo, MB
Publicada:
1 ene 2008
Categoría:
Paleontology
Resumen:
Based on the lithology of the Izucar de Matamoros (IzM) sections, and the occurrence of index taxa such as Armeria, Cicatricosisporites dorogensis, Corsinipollenites, Euconnnia, Momipites coryloides, Momipites tenuipolus, Mutisiapollis, and Ranuculacidites operculatils, a correlation between the IzM sections and the CUayuca Formation stratotypes is proposed. The IzM sections are Late Eocene-Early Oligocene, and they are part of the evaporitic member (Mcy) of the CUayUca Formation. These new data are consistent with the palcoenvironmental interpretations proposed for the formation. It was probably deposited under local xeric conditions in a semiarid climate that allowed the development of grassland (Grarnineae with Amaranthaceae-Chenopodiaceae and Ephedra) Lind a thorn shrub community with Acacia, other Leguminosae, Liman, and Plurnbaginaceae. The neighboring communities were probably tropical deciduous forests. low tropical deciduous forest, thorn forest, and chaparral. There were also
Filiaciones:
Ramirez-Arriaga, E:
Univ Nacl Autonoma Mexico, Lab Palinol, Dept Paleontol, Inst Geol, Mexico City 04510, DF, Mexico
Martinez-Hernandez, E:
Univ Nacl Autonoma Mexico, Lab Palinol, Dept Paleontol, Inst Geol, Mexico City 04510, DF, Mexico
Flores-Olvera, H:
Univ Nacl Autonoma Mexico, Dept Bot, Inst Biol, Mexico City 04510, DF, Mexico
Ochotorena, H:
Univ Nacl Autonoma Mexico, Dept Bot, Inst Biol, Mexico City 04510, DF, Mexico
|