Tidal currents can propagate tens of kilometres landward from the shoreline, forming dense networks of meandering channels, which drain vegetated areas and range in width from tens to hundreds of metres. Sedimentary products of these inland tidal channels are poorly documented in the stratigraphic record, as most studies on tidal processes occurring in inland areas are focused on fluvio-tidal interaction. The present study contributes to filling this gap, investigating Late Maastrichtian meandering-channel deposits of the Tremp-Graus Basin (Southern Pyrenees, Spain). These deposits accumulated in a growth syncline, which allowed the development of a 20 to 30 km wide, 80 to 100 km long, tidal embayment. Sporadic occurrence of poorly-developed rhythmites and bidirectional currents confirms the occurrence of tidal processes, whereas their local dominance is inferred from several pieces of evidence, including: (i) disproportion between depth of the larger channels and related catchment area; (ii) landward-accretion of point-bar bodies; (iii) landward fining of point-bar bodies, and (iv) reconstruction of palaeo-flow patterns at the meander bend scale. This work shows that three-dimensional architectural modelling and reconstruction of bar planform transformation styles can provide a critical contribution to the understanding of tidal control on sedimentation in inland areas.

中文翻译：

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解读潮汐过程，其特征是神秘的：Tremp 组（西班牙南比利牛斯山脉）的马斯特里赫特蜿蜒通道沉积物

潮汐流可以从海岸线向陆地传播数十公里，形成密集的蜿蜒通道网络，排水植被区，宽度从数十米到数百米不等。这些内陆潮汐通道的沉积产物在地层记录中的记录很少，因为大多数内陆地区潮汐过程的研究都集中在潮汐相互作用上。本研究有助于填补这一空白，调查了 Tremp-Graus 盆地（西班牙南比利牛斯山脉）的马斯特里赫特晚期蜿蜒通道沉积物。这些沉积物在增长的向斜中积累，从而形成了 20 至 30 公里宽、80 至 100 公里长的潮汐湾。不发达的韵律和双向电流的零星出现证实了潮汐过程的发生，而它们在当地的优势是从几项证据推断出来的，包括： (i) 较大渠道的深度与相关集水区之间的不成比例；(ii) 点棒体的陆上增生；(iii) 点棒体的陆上细化，以及 (iv) 在曲折尺度上重建古流动模式。这项工作表明，三维建筑建模和条形平面变换样式的重建可以为理解内陆地区的潮汐控制沉积提供重要贡献。(iv) 在曲折尺度重建古流动模式。这项工作表明，三维建筑建模和条形平面变换样式的重建可以为理解内陆地区的潮汐控制沉积提供重要贡献。(iv) 在曲折尺度重建古流动模式。这项工作表明，三维建筑建模和条形平面变换样式的重建可以为理解内陆地区的潮汐控制沉积提供重要贡献。