A high-energy deposit in the Byzantine harbour of Yenikapı, Istanbul (Turkey)

Bony, Guénaëlle; Marriner, Nick; Morhange, Christophe; Kaniewski, David; Perinçek, Doğan

doi:10.1016/j.quaint.2011.03.031

Cited by 34 publications

(16 citation statements)

References 49 publications

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“…In the coarse-grained sequence (subunits I-IV), marine influence is clearly documented by increased Sr (>0.1%) and Ca (>30 %), by decreased Fe, and, for core LEF 1, by increased Na and decreased LOI (<3%) values (cf., e.g., Chagué-Goff, 2010;Vött et al, 2002Vött et al, , 2011. Especially the low Fe values (<0.5%) in subunits II and III indicate reduced terrigenous input during deposition of these sediments.…”

Section: Further Implications From the Geochemical Resultsmentioning

confidence: 96%

“…Especially the low Fe values (<0.5%) in subunits II and III indicate reduced terrigenous input during deposition of these sediments. However, increased input of terrigenous material is reported from several other tsunami deposits (e.g., Nanayama et al, 2000;Bony et al, 2011), where backwash currents transport terrestrial material (such as soil sediments, plant remains) seaward and the stratigraphy of the tsunami deposit contains distinct layers of backwash sediments. As described before, it is assumed that backwash is of minor importance for the investigated sites due to the topographical setting of the Lefkada Lagoon and the Lefkada Sound.…”

Section: Further Implications From the Geochemical Resultsmentioning

confidence: 99%

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The Gyra washover fan in the Lefkada Lagoon, NW Greece—possible evidence of the 365 AD Crete earthquake and tsunami

et al. 2012

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Coastal geomorphological and geological archives store valuable information about the geodynamic evolution of coastal areas and the contributing geomorphodynamic processes. The coastal geomorphology of the LefkadaPreveza coastal zone, NW Greece, holds evidence for the influence of both gradual, low-energy and episodic, high-energy coastal processes. Situated close to the Hellenic Arc and the Cefalonia transform fault, the area belongs to one of the seismically most active regions in the Mediterranean. Thus, tsunami events are assumed to have contributed to the coastal evolution in the study area according to tsunami catalogues and field evidence from previous investigations. The northern part of the Lefkada Lagoon, separated from the Ionian Sea by an extensive barrier beach system, is characterized by a number of fan-like washover structures, formed by different washover generations. In this paper, we present detailed geomorphological, sedimentological, geochemical and foraminiferal investigations on the most prominent fan structure, the Gyra fan, based on terrestrial and lagoonal sediment cores. The Gyra fan consists of a coarse-grained sequence of fully marine origin on top of lagoonal mud and a palaeosol, respectively. The sequence shows numerous characteristics of extreme wave deposits. Due to the dimension and morphology of the fan, the existence of up to four consistent and correlative stratigraphic subunits, their landward thinning and their comparable sedimentary characteristics, we argue that a tsunami event induced the formation of the Gyra fan, comprising at least four major inundation impulses. According to radiocarbon dates, this geomorphological structure was most likely formed by teletsunami effects triggered by the 365 AD earthquake off western Crete.

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Section: Further Implications From the Geochemical Resultsmentioning

confidence: 96%

Section: Further Implications From the Geochemical Resultsmentioning

confidence: 99%

The Gyra washover fan in the Lefkada Lagoon, NW Greece—possible evidence of the 365 AD Crete earthquake and tsunami

et al. 2012

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“…A number of different reasons lead us to suggest that Lechaion's harbor was dredged: (1) we measure very modest sedimentation rates compared to other ancient harbors such as Graeco‐Roman Tyre (10 mm/yr; Marriner & Morhange, ), Byzantine Theodosius harbor (15 mm/yr; Bony et al, ), or Archaic Marseille (22 mm/yr; Morhange et al, ). In Lechaion, we observe remarkably modest rates of <1 mm/yr.…”

Section: Inner Harbor Sedimentationmentioning

confidence: 97%

Late Holocene Tectonic Uplift and the Silting Up of Lechaion, the Western Harbor of Ancient Corinth, Greece

et al. 2012

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“…Previous geological and geoarchaeological studies (Algan et al ; , , ; Bony et al, ; Perinçek, , ; Yalçın et al, ) unanimously differentiated four basic sedimentary packages at the harbor, namely: a basement composed of a Miocene‐aged unit and an Early‐Mid Holocene dark‐colored swamp deposit; then a marine sequence consisting of mainly sands overlying this basement; then a coarse‐grained fluviatile sediment package above the marine deposits; and on the top an artificial fill and agricultural soil of the last centuries (Figure ).…”

Section: The Holocene Sequence In Yenikapi‐istanbulmentioning

confidence: 99%

Establishing a high‐resolution stratigraphy in the Holocene marine sequence of the ancient Theodosian harbor of Istanbul with the help of dendrochronology

Yalçın

Sezerer‐Bulut²,

Pearson

et al. 2019

Geoarchaeology

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Salvage excavations in the Theodosian harbor (Yenikapı‐Istanbul) have uncovered diverse archaeological objects including 36 shipwrecks and various Byzantine period wooden docks. The sequence of these docks provided a unique opportunity to obtain a high‐resolution stratigraphy. The new approach is based on stratigraphic interpretation of deformation patterns created by the posts in soft sediments, combined with dendrochronological dating of the posts. Dendrochronology offers the potential to date the posts to within one calendar year of felling, a level of precision and accuracy rare in sedimentological analysis. The posts, most of them Quercus, were rammed during six different time periods. The first period is associated with posts cut in 528 AD. The second and third periods are dated by posts cut in 583 and 594 AD, respectively. The fourth‐period dates within 8–10 years of 639 AD. The fifth period could be dated only roughly to between 690 and 770 AD. The last period produced a possible placement of after 778 AD. This new approach helps to establish a high‐resolution stratigraphy. Furthermore, it provides information about sedimentation history and specific anthropogenic events.

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A high-energy deposit in the Byzantine harbour of Yenikapı, Istanbul (Turkey)

Cited by 34 publications

References 49 publications

The Gyra washover fan in the Lefkada Lagoon, NW Greece—possible evidence of the 365 AD Crete earthquake and tsunami

The Gyra washover fan in the Lefkada Lagoon, NW Greece—possible evidence of the 365 AD Crete earthquake and tsunami

Late Holocene Tectonic Uplift and the Silting Up of Lechaion, the Western Harbor of Ancient Corinth, Greece

Establishing a high‐resolution stratigraphy in the Holocene marine sequence of the ancient Theodosian harbor of Istanbul with the help of dendrochronology

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