Raised paleoshorelines were detected in the eastern margin of the Campania Plain, which is one of the largest coastal basins in the Tyrrhenian back-arc basin system associated with the Neogene to Quaternary Apennine orogen. The paleoshoreline remnants crop out at variable elevations at several sites, including quarry cuts, which provide excellent 3D exposures of the coastal landforms and deposits, the associated continental sediments and faults dissecting those landforms and deposits. Based on the integration of geomorphological, stratigraphic, micropaleontological and facies analyses with structural data, we reconstructed shoreline development in response to erosional/depositional processes governed by relative sea level change in the framework of coeval extensional tectonics. Most of the paleoshoreline remnants are assigned to three displaced marine terraces that, based on new U-series dating, are related to the late part of the Middle Pleistocene. The faults offsetting the marine terraces (namely, E-W striking normal faults and NNW striking transfer faults) are interpreted as part of a single, segmented extensional fault system controlled by roughly N-S to NNW-SSE horizontal extension. The identified extensional system, being consistent with the regional structure imaged by seismic data, represents the first field evidence of the tectonics controlling the formation of the Campania Plain basin. Our results, providing new direct evidence that effectively complements the large amount of existing subsurface datasets, allow for a significant step forward in the understanding of the tectonic and sedimentary processes governing the Quaternary development of the Tyrrhenian back-arc basin margin.

在坎帕尼亚平原东缘发现了凸起的古海岸线，坎帕尼亚平原是第勒尼安背弧盆地系统中与新近纪至第四纪亚平宁造山带相关的最大沿海盆地之一。古海岸线残余物在包括采石场在内的多个地点以不同的高度种植，这些采石场可以为沿海地貌和沉积物，相关的大陆沉积物和断层将这些地貌和沉积物进行解剖提供出色的3D曝光。在将地貌学，地层学，微古生物学和相分析与结构数据相结合的基础上，我们重建了海岸线发展，以响应在近代伸展构造框架内受相对海平面变化控制的侵蚀/沉积过程。根据新的U系列测年，大多数古海岸线残余物被分配到三个位移的海洋阶地，这些阶地与中更新世晚期有关。偏移海洋阶地的断层（即EW撞击正常断层和NNW撞击转移断层）被解释为单个分段的伸展断层系统的一部分，该断层伸展断层系统大致由NS到NNW-SSE水平伸展控制。所确定的伸展系统与地震数据成像的区域结构一致，代表了构造学控制坎帕尼亚平原盆地形成的第一个现场证据。我们的结果提供了可以直接补充大量现有地下数据集的新的直接证据，