Isidoros Kampolis, S. Triantafyllidis, V. Skliros, Evangelos Kamperis
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Both features correspond to the sea-level stand at which intense karstification occurred. The tidal notch bears a horizontal arrangement of Lithophaga borings at the vertex. Sedimentological investigation of the Selinitsa fine-grained deposit revealed the paleohydrologic regime of the cave. It is characterized by “slack-water” facies, indicating very low water flow speeds, whereas the thickness of the deposit points to stable hydrological conditions for prolonged periods. The cave sediment height of 18.8 m asl indicates a flooding level higher than sea level. The overlying Plattenkalk flysch is most probably the major source of detritus, and the predominance of authigenic dolomite (>98% modal in the carbonate fraction) indicates a hyposaline environment related to mixing of sea water with percolating fresh water. The approach of this study shows the significance of 3D mapping, bio-geo-Relative Sea Level (RSL) indicators, and sedimentology in deciphering the paleogeographic evolution of coastal karstic systems and subsequently defining the paleoclimate regime of coastal areas in Greece and the eastern Mediterranean during the Late Quaternary.","PeriodicalId":54131,"journal":{"name":"Quaternary","volume":" ","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2022-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":"{\"title\":\"Quaternary Evolutionary Stages of Selinitsa Cave (SW Peloponnese, Greece) Reveal Sea-Level Changes Based on 3D Scanning, Geomorphological, Biological, and Sedimentological Indicators\",\"authors\":\"Isidoros Kampolis, S. Triantafyllidis, V. 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引用次数: 4
摘要
三维测绘以及洞穴和附近景观的地貌研究揭示了Selinitsa洞穴（希腊伯罗奔尼撒西南部）的重要进化阶段。在海拔6米、10.7米、16.6米和30-32米的海岸洞穴区域发现了四个海洋阶地，16.6米的阶地代表海洋同位素阶段（MIS）5。Selinitsa洞穴最宽的岩溶空间集中在海拔15.73米至18.05米之间，峰值位于海拔16.4米处，对应于潜水/副潜水带在足够长的一段时间内稳定的水平。洞穴入口处16.4 m asl的潮汐缺口与16.6 m的海洋阶地相关。这两个特征都对应于发生强烈岩溶作用的海平面。潮汐缺口在顶部具有石斑钻孔的水平排列。Selinitsa细粒沉积物的沉积学调查揭示了洞穴的古水文状况。其特征是“松弛水”相，表明水流速度非常低，而沉积物的厚度表明水文条件长期稳定。洞穴沉积物高度为18.8 m asl，表明洪水水位高于海平面。上覆的Plattenkalk复理石很可能是碎屑的主要来源，自生白云石（碳酸盐组分中>98%的莫代尔白云岩）占主导地位，表明存在与海水与渗透淡水混合有关的低盐环境。本研究的方法显示了三维测绘、生物地理相对海平面（RSL）指标和沉积学在解读第四纪晚期希腊和地中海东部沿海岩溶系统的古地理演化以及随后确定古气候制度方面的重要意义。
Quaternary Evolutionary Stages of Selinitsa Cave (SW Peloponnese, Greece) Reveal Sea-Level Changes Based on 3D Scanning, Geomorphological, Biological, and Sedimentological Indicators
Significant evolutionary stages of Selinitsa Cave (SW Peloponnese, Greece) were revealed by 3D mapping, as well as geomorphological study of the cave and the nearby landscape. Four marine terraces were identified in the area of the coastal cave at 6, 10.7, 16.6, and 30–32 m above sea level (asl), with the terrace at 16.6 m representing Marine Isotope Stage (MIS) 5. The widest karstified space of Selinitsa Cave clusters between 15.73 and 18.05 m above sea level (asl), with the peak lying at 16.4 m asl, corresponding to the level where the phreatic/epiphreatic zone was stable for a sufficient period of time. A tidal notch at 16.4 m asl at the cave entrance is correlated to the marine terrace at 16.6 m. Both features correspond to the sea-level stand at which intense karstification occurred. The tidal notch bears a horizontal arrangement of Lithophaga borings at the vertex. Sedimentological investigation of the Selinitsa fine-grained deposit revealed the paleohydrologic regime of the cave. It is characterized by “slack-water” facies, indicating very low water flow speeds, whereas the thickness of the deposit points to stable hydrological conditions for prolonged periods. The cave sediment height of 18.8 m asl indicates a flooding level higher than sea level. The overlying Plattenkalk flysch is most probably the major source of detritus, and the predominance of authigenic dolomite (>98% modal in the carbonate fraction) indicates a hyposaline environment related to mixing of sea water with percolating fresh water. The approach of this study shows the significance of 3D mapping, bio-geo-Relative Sea Level (RSL) indicators, and sedimentology in deciphering the paleogeographic evolution of coastal karstic systems and subsequently defining the paleoclimate regime of coastal areas in Greece and the eastern Mediterranean during the Late Quaternary.
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