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| navigate by keyword : alghero ancient archaeogeology biodetritus biogenic calcification calcite capocaccia cave coral crust deposit earthlayer environment erosion formation fossil fossilrecord geology geopark geoscience grotta italy karst layered limestone limestonebed marine mineral miozene natural nature neptune organic outcrop paleontology pattern petrified reef remains rock rockface sardinia sedimentary speleology stratification stratum structure terrain texture |
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| Detailed view of layered limestone structure near Grotta di Nettuno showing fossil-like formations and sedimentary rock patterns. |
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