Micro‐organisms producing microbially induced sedimentary structures, particularly epibenthic cyanobacteria, are not facies‐dependent and could flourish in any environment if appropriate ecological conditions were provided. Hence, the changes in environmental parameters are the controlling factors on ecological tolerance of the producers. This study on the lower Cambrian successions of the Lalun Formation in Central Iran shows that paralic environments reacted differently to changes in parameters such as river and tide energy, palaeo‐topography, the rate of sediment supply and fluctuations in sea‐level, even though all were characterized by sandy substrates suitable for the development of microbially induced sedimentary structures. Therefore, the abundance and preservation of microbially induced sedimentary structures varied in the different paralic environments. From a sequence stratigraphic viewpoint, this study demonstrates that erosional discontinuities lacked the conditions required for the substrate stabilization by microbial communities. The distribution, size and type of microbially induced sedimentary structures within high frequency cycles generally follow the trends of changes in vertical facies stacking patterns. Within systems tracts, the pattern, morphological diversity and size of microbially induced sedimentary structures are not dependent on the type of systems tract, but on the type of depositional system developed such as delta, incised valley, coastal plain, estuaries and shoreline to shelf systems. Generally, estuarine and peritidal carbonates record an increase in the development of mat colonization during the transgressive systems tract, owing to decreased sedimentation rate as well as extended shallow water habitats. In contrast, the existence of microbially induced sedimentary structures depends on the pattern of shoreline shift in depositional systems developed during the highstand systems tract, such as open coast tidal flat and delta environments. If a shoreline regression was continuous (depositional trend and stacking pattern are a set of high frequency cycles), a greater increase in the aggradational component than the progradational component would cause intensified destructive processes hindering the development of microbial communities.

中文翻译：

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微生物的伊朗下寒武统演替沉积结构的古生态，沉积学和地层学见解

产生微生物诱导的沉积结构的微生物，特别是表皮上的蓝细菌，与相无关，只要提供适当的生态条件，在任何环境中都可以繁殖。因此，环境参数的变化是生产者生态耐受性的控制因素。这项对伊朗中部拉伦组下寒武统演替的研究表明，即使在所有情况下，顺流环境对诸如河流和潮汐能，古地形，沉积物供应速率和海平面波动等参数变化的反应也不同。其特征是适合于微生物诱导沉积结构发展的含沙基质。因此，在不同的自然环境中，微生物诱导的沉积结构的丰度和保存程度各不相同。从层序地层学的角度来看，这项研究表明，侵蚀的不连续性缺乏微生物群落对基质稳定所必需的条件。高频周期内微生物诱导的沉积结构的分布，大小和类型通常遵循垂直相堆积模式的变化趋势。在系统区域内，微生物诱导的沉积结构的模式，形态多样性和大小不取决于系统区域的类型，而是取决于沉积系统的类型，例如三角洲，切开的山谷，沿海平原，河口和海岸线至陆架系统。通常，由于沉积速率降低以及浅水生境的延长，河口碳酸盐岩和围岩碳酸盐记录了海侵系统道中垫层定植的发展。相比之下，微生物诱发的沉积结构的存在取决于高位系统通道（如开阔的海岸潮滩和三角洲环境）期间沉积系统中海岸线移动的模式。如果海岸线回归是连续的（沉积趋势和堆积模式是一组高频周期），则凝结成分的增加幅度大于沉积成分的增加幅度，将导致破坏性过程加剧，从而阻碍微生物群落的发展。由于沉积率降低以及浅水生境的扩展。相比之下，微生物诱发的沉积结构的存在取决于高位系统通道（如开阔的海岸潮滩和三角洲环境）期间沉积系统中海岸线移动的模式。如果海岸线回归是连续的（沉积趋势和堆积模式是一组高频周期），则凝结成分的增加幅度大于沉积成分的增加幅度，将导致破坏性过程加剧，从而阻碍微生物群落的发展。由于沉积率降低以及浅水生境的扩展。相比之下，微生物诱发的沉积结构的存在取决于高位系统通道（如开阔的海岸潮滩和三角洲环境）期间沉积系统中海岸线移动的模式。如果海岸线回归是连续的（沉积趋势和堆积模式是一组高频周期），则凝结成分的增加幅度大于沉积成分的增加幅度，将导致破坏性过程加剧，从而阻碍微生物群落的发展。例如沿海开放的潮滩和三角洲环境。如果海岸线回归是连续的（沉积趋势和堆积模式是一组高频周期），则凝结成分的增加幅度大于沉积成分的增加幅度，将导致破坏性过程加剧，从而阻碍微生物群落的发展。例如沿海开放的潮滩和三角洲环境。如果海岸线回归是连续的（沉积趋势和堆积模式是一组高频周期），则凝结成分的增加幅度大于沉积成分的增加幅度，将导致破坏性过程加剧，从而阻碍微生物群落的发展。