Investigation of Beachrock Using Microanalyses and OSL Dating: A Case Study from Bozcaada Island, Turkey

Ergi̇nal, Ahmet Evren; Kıyak, Nafiye Güneç; Öztürk, Beyhan

doi:10.2112/08-1151.1

Cited by 39 publications

(22 citation statements)

References 23 publications

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“…18) Therefore, the beachrock cement at site O is similar to that observed in the majority of the sites globally, whereas the type found at site I is very rare. The site O cement could be considered for constructing man-made rock.…”

Section: Beachrock Cementmentioning

confidence: 55%

Formation Mechanisms of Beachrocks in Okinawa and Ishikawa, Japan, with a Focus on Cements

Danjo

Kawasaki

2014

Mater. Trans.

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Beachrock is a type of sedimentary deposit held together mainly by calcium carbonate cement in the tidal zone of sandy beaches in tropical and subtropical regions. Man-made beachrock has the potential to inhibit coastal erosion; considering this important application, we performed field investigations and laboratory tests to understand the formation mechanisms of beachrocks in Okinawa and Ishikawa, Japan. We performed a needle penetration test, microbial population count and urease activity test, and conducted elemental and mineral analyses. Our investigation showed that in Okinawa the evaporation of seawater and/or urease activity of the microorganisms may have resulted in precipitation of high Mg calcite, leading to the formation of beachrock. In Ishikawa, beachrock and sand were present near a spring with a relatively high concentration of Al 3+ . The mixing of spring water (pH 4.7) with seawater could have led to the precipitation of the Al-and Si-bearing cement that is consolidating the sand particles, leading to development of beachrock.

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Section: Beachrock Cementmentioning

confidence: 55%

Formation Mechanisms of Beachrocks in Okinawa and Ishikawa, Japan, with a Focus on Cements

Danjo

Kawasaki

2014

Mater. Trans.

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“…Our knowledge on the origin and absolute age of beachrocks on Turkey's coastline is limited to a few recent publications (Erginal et al, 2008;Desruelles et al, 2009;Erginal et al, 2010). In this paper, we combine field descriptions and spectroscopic data with optical dating results to highlight the governing factors and timing of carbonate precipitation that have led to tight induration of beachrock grains and gravels under favourable climatic and hydrologic conditions.…”

Section: Introductionmentioning

confidence: 96%

First note on marine-like cementation of Late Holocene beachrock, Iznik Lake (Turkey)

et al. 2011

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Micro-fabric characteristics and optically stimulated luminescence (OSL) dating results are presented to discuss the controlling agents and timing of beachrock cementation on the fresh-water Iznik Lake shoreline. The beachrocks are made up of grain-supported polygenic conglomerate containing 20.42% carbonate with encrusted grains, basically as micrite coatings, isopachous aragonite rims, cryptocrystalline void fills and meniscus bridges. The optical ages of twelve samples yielded ages that range from 4.226±0.569 ka on the lowermost beds to 0.706±0.081 on the uppermost. This is the first report of precipitation of marine-like cements in Iznik Lake. The abundant aragonitedominated cement is likely indicative of precipitation-prone dry evaporative conditions from the climatic optimum to the last millennia.

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“…The age obtained is the date of death of the organism and there is likelihood that the difference in time from the death of the organism to its incorporation in the beachrock may be hundreds or thousands of years (Hopley, 1986). During the last decade, the OSL method has also been attempted to date beachrocks for the reconstruction of palaeoshorelines along the Brazilian coast (Barreto et al, 2002;Tatumi et al, 2003), India (Thomas, 2009) and Turkey (Erginal et al, 2010) and the results were also compared/constrained by radiocarbon dating.…”

Section: Introductionmentioning

confidence: 99%

Study of Beachrocks in East Attica

et al. 2017

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Investigation of Beachrock Using Microanalyses and OSL Dating: A Case Study from Bozcaada Island, Turkey

Cited by 39 publications

References 23 publications

Formation Mechanisms of Beachrocks in Okinawa and Ishikawa, Japan, with a Focus on Cements

Formation Mechanisms of Beachrocks in Okinawa and Ishikawa, Japan, with a Focus on Cements

First note on marine-like cementation of Late Holocene beachrock, Iznik Lake (Turkey)

Study of Beachrocks in East Attica

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