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Please use this identifier to cite or link to this item: http://hdl.handle.net/10362/3296

Título: Synthesis of the Piacenzian onshore record between the Aveiro and Setubal parallels (Western portuguese margin)
Autor: Cunha, P. P.
Barbosa, B. P.
Pena dos Reis, R.
Palavras-chave: Piacenzian
Mondego and Lower Tagus basins
lithostratigraphy
correlation
depositional model
tectonic
Issue Date: 25-Mar-2010
Resumo: Onshore, the Piacenzianof the Mondego and Lower Tagus Tertiary basins comprises siliciclastic sediments deposited in shallow marine to continental environments. The outcrops of the deposits are relatively widespread in the Aveiro and Seuibal region. A lithostratigraphic synthesis based on the correlation of geological sections, is presented for the two basins. In general, the Piacenzian sediments display a regressive sucession. The Late Tortonian-Zanclean (?) confined drainage pattern changed at the beginning of Piazencian, to fluvial systems draining to the Atlantic, and capturing the drainage of the inner parts of the Hesperic Meseta. The Piacenzian sedimentary sequence post-dates one of the uprising phases during Neogene compression, recorded by a strong regional unconformity. Some local active faulting - as in Lousa, Rio Maior and Senibal- Pinhal Novo - allowed the local thickening of the sedimentary record. Later compressive tectonism continues to generate reverse faulting and diapiric reactivation, affecting those sediments. Currently, the Piacenzian deposits culminates the marginal piedmonts, widely eroded by the Quaternary fluvial dissection.
URI: http://hdl.handle.net/10362/3296
Appears in Collections:FCT: DCT - Ciências da Terra

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