Tsunami sedimentation associated with the Lisbon earthquake of 1 November AD 1755: Boca do Rio, Algarve, Portugal

Tsunami sedimentation associated with the Lisbon earthquake of 1 November AD 1755: Boca do Rio, Algarve, Portugal

A description is given of a distinctive marine deposit at Boca do Rio on the Algarve coast of Portugal. It is proposed here that the sediment accumulation was deposited by the tsunami generated by the Lisbon earthquake of 1 November, AD 1755. The deposit exhibits sedimentary characteristics quite un...

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Veröffentlicht in:Holocene (Sevenoaks) 1995-01, Vol.5 (2), p.209-215
Hauptverfasser: Dawson, A.G., Hindson, R., Andrade, C., Freitas, C., Parish, R., Bateman, M.
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container_end_page 215
container_issue 2
container_start_page 209
container_title Holocene (Sevenoaks)
container_volume 5
creator Dawson, A.G.
Hindson, R.
Andrade, C.
Freitas, C.
Parish, R.
Bateman, M.
description A description is given of a distinctive marine deposit at Boca do Rio on the Algarve coast of Portugal. It is proposed here that the sediment accumulation was deposited by the tsunami generated by the Lisbon earthquake of 1 November, AD 1755. The deposit exhibits sedimentary characteristics quite unlike other coastal sediment accumulations that are deposited by more moderate wave régimes. These include laterally continuous sand layers, chaotic pebble horizons, large amounts of gravel-sized shell debris and distinctive assemblages of marine microfossils. A preliminary attempt is made here to use the empirical field and laboratory data to define more clearly the processes of coastal sedimentation that characterize tsunami runup. The use of tsunami sediments as time synchronous marker horizons is also discussed.
doi_str_mv 10.1177/095968369500500208
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title Tsunami sedimentation associated with the Lisbon earthquake of 1 November AD 1755: Boca do Rio, Algarve, Portugal
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