Abstract:
The Araçatuba Formation holds mainly pelitic rocks deposited in a lacustrine environment on the Bauru Basin (Upper Cretaceous), in the central-western portion of the São Paulo. Many previsous studies about this unit were located in the Tiete, Aguapeí (or Feio) and Peixe river valleys, with sedimentological and stratigraphic approaches. From recent clay prospective works to supply heavy clay ceramic sector in the western region of this state, pelitic outcrops of this unit were recognized in Santo Anastácio river valle. Based on columnar sections descriptions and facies analysis, it was identified three depositional environments (lacustrine, ephemeral fluvial and aeolian), under arid to semi-arid climatic conditions during sedimentation. The lacustrine environment has received sediment from ephemeral rivers and debris torrential rain period and was also overlaid by aeolin deposits (dunes and ripples), in the drier periods. The laboratory analysis for ceramic characterization has showed positive results for the pelitic layers as a source of raw materials in the manufacture of heavy clay ceramic products.
Reference:
ALBARELLI, Daniel Seabra Nogueira Alves; BATEZELLI; Alessandro; CABRAL JR., Marsis. Paleoambientes e caracterização tecnológica para fins cerâmicos da Formação Araçatuba no Vale do Rio Santo Anastácio (Bacia Bauru, SP). Geociências, v.34, n.4, p.784-800, 2015.
The Araçatuba Formation holds mainly pelitic rocks deposited in a lacustrine environment on the Bauru Basin (Upper Cretaceous), in the central-western portion of the São Paulo. Many previsous studies about this unit were located in the Tiete, Aguapeí (or Feio) and Peixe river valleys, with sedimentological and stratigraphic approaches. From recent clay prospective works to supply heavy clay ceramic sector in the western region of this state, pelitic outcrops of this unit were recognized in Santo Anastácio river valle. Based on columnar sections descriptions and facies analysis, it was identified three depositional environments (lacustrine, ephemeral fluvial and aeolian), under arid to semi-arid climatic conditions during sedimentation. The lacustrine environment has received sediment from ephemeral rivers and debris torrential rain period and was also overlaid by aeolin deposits (dunes and ripples), in the drier periods. The laboratory analysis for ceramic characterization has showed positive results for the pelitic layers as a source of raw materials in the manufacture of heavy clay ceramic products.
Reference:
ALBARELLI, Daniel Seabra Nogueira Alves; BATEZELLI; Alessandro; CABRAL JR., Marsis. Paleoambientes e caracterização tecnológica para fins cerâmicos da Formação Araçatuba no Vale do Rio Santo Anastácio (Bacia Bauru, SP). Geociências, v.34, n.4, p.784-800, 2015.
