IL RUOLO DEI DEPOSITI PIROCLASTICI NELL’ANALISI CRONOSTRATIGRAFICA DEI TERRENI QUATERNARI DEL SOTTOSUOLO DELLA PIANA CAMPANA (ITALIA MERIDIONALE )

Abstract

: Aprile F. et al., The role of pyroclastic deposits in the chronostratigraphic analysis of the Quaternary terrains in the subsoil
of the Campanian Plain (Southern Italy). (IT ISSN 0394-3356, 2004).
The critical reinterpretation of stratigraphic data of mechanical soudings concerning the subsurface of Campanian Plain (Southern
Italy) provides a new picture of the geometry and chronostratigraphic position of the Quaternary deposits filling the sedimentary basin
of this Plain.
The radiometrically dated ignimbrite deposits, of Campanian Ignimbrite (~39 ka B.P) and Taurano Ignimbrite (~157 ka B.P), have been
considered as levels guide in carrying out the correlations between the lithological units. This has allowed the singling out of marine
sediments, previuously not well considered, underlaying the Taurano Ignimbrite indicating that the Campanian Plain underwent subsidence even prior to upper Pleistocene.
The structural and stratigraphic analogy, in the subsurface, among the Sarno’s area with the corresponding sectors of Nola, Cicciano
and Cancello located along the carbonatic reliefs, bordering the Plain to NW-SE direction, has also been recognized.
Finally a pyroclastic deposit at present not well differentiated, topographically localized in the central area of the Plain, to the top of
Taurano Ignimbrite, has been recognized.
The re-examination of the stratigraphical sequences, picked in more significant sections, provides a new frame of the subsurface characteristics of the Campanian Plain and a preliminary contribution for the knowledge of the recent structural evolution.