Tectonic activity in extensional basins has a profound control on accommodation and sediment supply through the interplay between footwall uplift and hanging-wall subsidence, and thus largely influences the three-dimensional architecture of syn-rift sequences. This is emphasized in areas close to major rift-border faults, where steep coastal reliefs and fluvial gradients produce compound facies zonation and stratigraphic styles with strong lateral variability. The lower Permian High Cliff Sandstone was deposited in an array of shallow marine environments along the margin of the northern Perth Basin during a protracted late Paleozoic rifting episode in Western Australian basins. The formation is composed of fluvio-deltaic and nearshore strata sharply overlying a thick succession of offshore mudstone that was deposited during a phase of tectonic quiescence. This basal contact likely reflects submarine erosion and is, therefore, interpreted as a regressive surface of marine erosion generated in response to forced regression. The facies arrangement consisting of interbedded sandstone, conglomerate, and heterolithic facies chiefly records the evolution of a low- to high-gradient paleoshoreline punctuated by coastal streams, steep sea cliffs, and back-barrier lagoons. Extraformational outsized clasts were probably emplaced by the erosion of exhumed basement and older sedimentary rocks through fluvial incision, wave sapping, or landsliding. The along-strike variability between low- and high-gradient shoreline deposits indicates a dynamic depositional setting with a complex tectonic influence. The basal regressive surface of marine erosion is attributed to footwall uplift during the early reactivation stage of basin-bounding normal faults and, therefore, records the initiation of a new syn-rift phase in the northern Perth Basin.

中文翻译：

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裂谷盆地边缘复杂的早二叠世粗粒海岸线的演变

伸展盆地的构造活动通过下盘隆起和上盘沉陷之间的相互作用，对容纳和沉积物供应具有深远的控制作用，因此在很大程度上影响了同裂谷层序的三维构造。在靠近主要裂谷边界断层的地区强调了这一点，那里陡峭的海岸起伏和河流坡度产生了具有明显横向变化性的复合相带和地层样式。较低的二叠系高崖砂岩是在西澳大利亚盆地晚古生代长期裂陷期间沿珀斯盆地北部边缘的一系列浅海环境中沉积的。该地层由河流-三角洲和近岸地层组成，这些地层急剧地覆盖了在构造静止阶段沉积的厚厚的一系列近海泥岩。这种基础接触可能反映了海底侵蚀，因此被解释为响应强迫回归而产生的海洋侵蚀的回归面。由夹层砂岩，砾岩和异质岩相组成的相序主要记录了由沿海溪流，陡峭的海崖和后屏障泻湖所刺穿的低至高梯度古海岸线的演化。超大型的碎屑可能是由于河床切开，波浪劈裂或滑坡造成的已发掘的地下室和较老的沉积岩的侵蚀所致。低坡度和高坡度海岸线沉积物的沿走动变化表明了具有复杂构造影响的动态沉积环境。海洋侵蚀的基础回归面归因于盆地边界正断层的早期复活阶段的下盘抬升，因此，它记录了珀斯北部盆地新的同裂阶段的开始。