To the northwest of the ancient city of Ostia, the analysis of cores revealed a stratigraphic sequence, which we interpret as the filling of a harbour basin. This basin, located at the west of the so-called “Palazzo Imperiale” presents seven characteristics: (1) The maximum depth is 6 m below the Roman sea level. This depth allowed any type of ship (even heavy tonnage) to access the harbour. (2) A chro- nostratigraphic gap at 6 m below Roman sea level suggests digging operations in the basin (or sub- sequent dredging) that have caused the loss of sedimentary archives. (3) The filling consists of dark clays typical of a quiet environment but open to marine and river influences. (4) The dates at the base of this sequence give a range between the 4th and the 2nd century BC. (5) In the harbour sequence, a facies change at 2.5 m under the Roman sea level involves a change in the processes of sedimentation and/or operation. (6) No later than the beginning of the 1st century AD, the thickness of the water column in the basin is less than 50 cm and seems to be caused by a massive siltation following a succession of floods of the Tiber. (7) This basin was thus already abandoned during the start-up of Portus.

Geoarchaeology confirms location of the ancient harbor basin of Ostia (Italy) / J. P., Goiran; F., Salomon; I., Mazzini; J. P., Bravard; E., Pleuger; C., Vittori; G., Boetto; J., Christiansen; P., Arnaud; A., Pellegrino; Pepe, Caterina; Sadori, Laura. - In: JOURNAL OF ARCHAEOLOGICAL SCIENCE. - ISSN 0305-4403. - STAMPA. - 41(2014), pp. 389-398. [10.1016/j.jas.2013.08.019]

Geoarchaeology confirms location of the ancient harbor basin of Ostia (Italy)

PEPE, CATERINA;SADORI, Laura
2014

Abstract

To the northwest of the ancient city of Ostia, the analysis of cores revealed a stratigraphic sequence, which we interpret as the filling of a harbour basin. This basin, located at the west of the so-called “Palazzo Imperiale” presents seven characteristics: (1) The maximum depth is 6 m below the Roman sea level. This depth allowed any type of ship (even heavy tonnage) to access the harbour. (2) A chro- nostratigraphic gap at 6 m below Roman sea level suggests digging operations in the basin (or sub- sequent dredging) that have caused the loss of sedimentary archives. (3) The filling consists of dark clays typical of a quiet environment but open to marine and river influences. (4) The dates at the base of this sequence give a range between the 4th and the 2nd century BC. (5) In the harbour sequence, a facies change at 2.5 m under the Roman sea level involves a change in the processes of sedimentation and/or operation. (6) No later than the beginning of the 1st century AD, the thickness of the water column in the basin is less than 50 cm and seems to be caused by a massive siltation following a succession of floods of the Tiber. (7) This basin was thus already abandoned during the start-up of Portus.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/615632
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