Vi dating site

Moreover, at two locations within the Tiber valley incision (Via Flaminia, Fig. 2a) the TP rests directly above a thick gravel layer which constitutes the basal, coarse portion of the VGF aggradational succession in Rome.Stratigraphic evidence at Viale Tiziano and at Capitoline Hill (Fig.Ar ages of the primary pyroclastic deposits of Tufo Giallo di Prima Porta (TGPP) and Fall A1 occurring at the base and in the middle of the fluvial-lacustrine succession (sample NCR4, NCR1, Table 1, Fig. In order to provide further constraints on the deposition of the VGF, two samples of pyroclastic-fall deposits (sample C2-SC, C5-SC, Table 1) at the proximal section of Santa Cecilia (Figs 1 and 3) also have been dated and correlated with Fall A1 and Fall C, respectively.In addition, we have re-investigated and sampled for geochemical analyses all the geologic sections along the Tiber River and the Foso Galeria Stream valleys in which the VGF is exposed, in order to reconstruct sediment aggradation through time and space.A) Malagrotta section exposing the sedimentary deposit of the Valle Giulia Formation (MIS 13), erosionally above those of the older Ponte Galeria 2 Formation (MIS 17).A massive, sand matrix supported gravel layer (a,c) is present at the base of the incision hosting the aggradational succession of the Valle Giulia Formation (MIS 13), which cut through the sand deposit of the Ponte Galeria 2 Formation (MIS 17).The gravel is laterally in contact with both the primary deposit of the TGPP (d), as well as with abundant, sub-primary volcanic deposit (a,b), providing further evidence that the pyroclastic-flow deposit was emplaced during an erosive phase. The Tufo del Palatino (TP) pyroclastic-flow deposit outcrops at variable elevation throughout the area of Rome (Fig. It follows channels within the paleovalley of the Tiber River, where it occurs at lower elevation with respect to the plateau-like area in the vicinity of the city center (see also Supplementary Figure 2, reconstructing the base surface of TP).

3)) and the following (San Paolo Formation -SP, MIS 11 (ref.8) used the ages of the gravel-clay transitions in the older aggradational successions of the Paleo-Tiber River, determined through .A very good match was found between the timing of gravel-clay transition and that of the glacial termination provided by the isotopic record of (ref.3)) aggradational succession at the investigated geologic sections in the western area of Rome (see Fig.1 for location) b-b”) Reconstruction of the erosional/depositional phases during aggradation of the VGF showing the occurrence of an erosive phase coeval with emplacement of TGPP (b’), supposed to follow an early aggradational phase (b) corresponding to that evidenced in Rome to occur during emplacement of TP, and followed by deposition of the late aggradational succession of the VGF (b”) (see text for detail).

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Remarkably, no independent age constraint exists in the literature for glacial termination VI, apart from the ) deposited in response to sea-level rise during MIS 13 (Table 1).

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