Artículos de revistas
Tafonomia de moluscos fósseis do Grupo Bauru (Cretáceo Superior, Bacia Bauru), na região do município de Monte Alto, São Paulo, Brasil
Fecha
2011-05-01Registro en:
Boletim do Museu Paraense Emilio Goeldi Ciencias Naturais. , v. 6, n. 2, p. 190-206, 2011.
1981-8114
ZOOREC:ZOOR14802009498
ZOORECZOOR14802009498.pdf
3868502906886933
0000-0003-0410-8011
Autor
Universidade Estadual Paulista (Unesp)
Institución
Resumen
Bivalves mollusks fossils of Bauru Group (Late Cretaceous, Bauru Basin) deposited in scientific collections and collected in outcrops from Monte Alto municipality, São Paulo, are analyzed in their taphonomy. The preservation of recrystallized individual in carbonatic matrix indicates substrate remobilization by unidirectional energetic event in fluvial discharge. The specimens with conjugated valves possess internal sediment similar to the external indicating low exposition to Taphonomical Active Zone, suggesting a bioclastic low time-averaging. The truncate and fragmented posterior portion of specimens from scientific collections is probably related to the incapacity of the taxa to reburrowing the substrate in drowning periods. Both taphonomic patterns corroborate evidences of a fluvial paleoenvironment in the Bauru Group.