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首页> 外文期刊>Geodinamica Acta >Beachrock as evidence of sea-level lowstand during the classical period, Parion antique city, Marmara Sea, Turkey
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Beachrock as evidence of sea-level lowstand during the classical period, Parion antique city, Marmara Sea, Turkey

机译：比奇洛克作为古典时期海平面低位的证据，帕里翁古董城，土耳其马尔马拉海

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摘要

Results obtained from beachrock lying on the north coast of the antique city of Parion in ?anakkale province, NW Turkey, are presented based on field data, petrographic analyses, cement fabrics, and radiocarbon dating. Extending to 20m offshore at a depth of -2m, the studied 50-cm thick beachrock is poorly sorted lithic sandstone. Both exposed and submerged parts are characterized by sequentially precipitated marine phreatic and vadose cements composed of micrite encrustations with micro-organism borings, pseudopeloidal aggregates of high-Mg calcites with scalenohedral habits and meniscus bridges. Radiocarbon ages point to a deposition during the classical period when the sea level was below (between -1 and -1.5 m) that of the present. The beachrock witnesses a granule- and pebble-dominated wide beach prior to cementation, suggesting that Parion's fortification walls were behind the coastline during this lowstand and raises questions concerning the existence of a harbor north of the city.
机译：基于野外数据，岩相分析，水泥织物和放射性碳测年，显示了位于土耳其西北部纳那卡莱省古城帕里恩（Parion）古城北海岸的滩涂获得的结果。所研究的50厘米厚的滩涂岩层一直延伸到水下2m处-2m的深度，是分类较差的岩性砂岩。裸露部分和淹没部分的特征都是依次沉淀的海洋潜水和渗流水泥，这些水泥由带有微孔的微尘壳，具有斜角面习性的高镁方解石的准倍体聚集体和弯月形桥组成。放射性碳年龄表明，在古典时期内，海平面低于当前水平（-1至-1.5 m）。在固井之前，沙滩岩见证了一个以颗粒和卵石为主的宽阔海滩，这表明在这个低潮时期，帕里昂的设防墙在海岸线的后面，并引发了有关城市北部港口存在的疑问。

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