justificação do valor científico
A distinct layer of the alluvial sediment infill of Boca do Rio disclosed evidences for a tsunamigenic deposit. These were based on eye-witness records (Pereira de Sousa, 1919), the geological record (Dawson et al. 1995) and fossil remains and ichnological structures (bioerosion) preserved in boulders lifted from a subtidal location and subsequently injected into the middle estuary area of Boca do Rio by a single short lived high magnitude event of marine flooding directly related to the AD 1755 Lisbon earthquake (Marques da Silva et al. 1996).
This deposits covers the old alluvial deposits and the Roman ruins of the 1st and 3rd centuries A.D.. This site reveal a fish processing industry with salting vats, scattered cetariae and rich mosaics.
DAWSON, A., HINDSON, R., ANDRADE, C., FREITAS, C., PARISH, R.; BATEMAN, M. (1995) – Tsunami sedimentation associated with the Lisbon earthquake of 1 November AD 1755: Boca do Rio, Algarve, Portugal. The Holocene, 5 (2): 209 – 215.
MARQUES DA SILVA, C., HINDSON, R.; ANDRADE, C. (1996) – Bioerosion evidence of extreme marine flooding of Algarve region (Southern Portugal) associated with the tsunami of the AD 1755 Lisbon Earthquake: taphonomic and (palaeo)ecological analysis. II Reunión Tafonomía y Fossilization, Zaragoza: 371 – 378.
PEREIRA DE SOUSA, F.L. (1919) – O terramoto do 1º de Novembro de 1755 em Portugal e um estudo demográfico. I, Distritos de Faro, Beja e Évora. Mem. Serv. Geol. Portugal, 44: 277 pp.
Outros valores e sua justificação
Presently an attempt to create an archeological site is being carried out. Archaeological excavations can be observed as well as the Roman ruins being exhumated by the sea.