Abstract Establishing critical comparisons between fluvial- and tidal-channel morphodynamics is a major goal in the study of coastal landscapes. Freely migrating meandering rivers are known to produce laterally extensive, sand-prone point-bar bodies which commonly exhibit width:thickness ratios up to 250. Meandering channels are widespread in tidal channel networks draining intertidal plains, where they exhibit planform dynamics similar to their fluvial analogues. However, tidal networks are characterized by a high channel density that likely hinders tidal meanders from migrating laterally for long distances without interacting with other channels. In order to better understand how the interaction between adjacent meandering channels controls the development of tide-dominated point bars, two point-bar bodies from the Eocene Castigaleu Formation (Spain) are investigated and compared with the geometry of a modern tidal point bar of the northern Venice Lagoon (Italy). The Eocene bars are characterized by a low width:thickness ratio (

中文翻译：

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受海盗控制的潮汐控制几何形状：来自古代沉积序列和现代河道网络的综合证据

摘要 建立河流和潮汐通道形态动力学之间的关键比较是沿海景观研究的一个主要目标。众所周知，自由迁移的蜿蜒河流会产生横向广泛、易出沙的点状坝体，其宽度：厚度比通常高达 250。 蜿蜒通道广泛存在于潮间带平原排水的潮汐通道网络中，在那里它们表现出类似于河流的平面动力学类似物。然而，潮汐网络的特点是通道密度高，这可能会阻碍潮汐曲流在不与其他通道相互作用的情况下长距离横向迁移。为了更好地理解相邻曲流河道之间的相互作用如何控制潮控点坝的发展，研究了始新世 Castigaleu 组（西班牙）的两个点坝体，并将其与威尼斯泻湖北部（意大利）的现代潮汐点坝的几何形状进行了比较。始新世条带的特点是宽厚比低（