Remarkably regular load structures are recognised in the late Vistulian (~15 ka BP) fluvial deposits exposed at the Gołąb site (eastern Poland). A mud layer, sandwiched between non-deformed sand, exhibits the unusual morphology of a 3D sine wave with parallel crests and troughs. Such structures are reported for the first time, remarkably differing from those previously described as having perfect linearity, which could be caused by horizontal shear affecting previously liquefied sediments or by lateral migration of the sediment liquefaction front. The deformation could be triggered by either seismic shock, loading by flood waters or periglacial processes. Seismicity of the study area is evident which supports the seismogenic hypothesis.

中文翻译：

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软沉积物变形结构的 3D 正弦波状几何：Teisseyre-Tornquist 带晚更新世地震活动的可能记录

在 Gołąb 遗址（波兰东部）出露的维斯图利亚晚期（约 15 ka BP）河流沉积物中发现了显着的规则荷载结构。夹在未变形沙子之间的泥层呈现出具有平行波峰和波谷的 3D 正弦波的不寻常形态。这种结构首次被报道，与之前描述的具有完美线性的结构显着不同，这可能是由水平剪切影响先前液化的沉积物或由沉积物液化前沿的横向迁移引起的。变形可能是由地震冲击、洪水加载或冰缘过程引发的。研究区的地震活动性很明显，这支持了发震假说。