The J-5 unconformity was originally described as occurring in Wyoming at the base of the Upper Jurassic Windy Hill Sandstone, where it separates the underlying Redwater Shale from the overlying Morrison Formation. The existence of this unconformity has been questioned, as has the closely coupled issue of the depositional environment of the Windy Hill Sandstone. In this article, we document the facies and architecture of the Redwater–Windy Hill–Morrison transition. Facies analysis indicates that the Windy Hill Sandstone represents a tide-dominated deltaic system that prograded northward across the shelf mudstones of the Redwater Shale, followed by the coastal plain of the Morrison Formation. The modern Han River Delta of Korea is a close analog to the Windy Hill Sandstone. The base of the Windy Hill Sandstone is not an unconformity; instead, it is conformable and time transgressive, becoming younger northward along depositional dip, implying that portions of the Redwater Shale and Morrison Formation are coeval. This reinterpretation of the J-5 unconformity in Wyoming, along with a greater appreciation of how abrupt stratigraphic contacts are formed stratigraphically, how they are recognized, and how unconformities are generated eustatically and tectonically, all suggest that a broader reappraisal of the Pipiringos and O’Sullivan unconformities is warranted. In addition, the recognition of a prograding tide-dominated delta in the highstand systems tract underscores the growing rejection of a sequence-stratigraphic paradigm that wave-dominated coasts form primarily during periods of progradation, with tide-dominated coasts being limited or favored during periods of transgression. Finally, tide-dominated deltas have been much more poorly recognized in the rock record than wave-dominated coasts and river-dominated deltas, but the previously unrecognized presence of one in the Windy Hill Sandstone suggests that other tide-dominated deltas might be similarly unrecognized in the rock record of epicontinental seas.

中文翻译：

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非整合面：美国怀俄明州 J-5 不整合面和 Redwater-Windy Hill-Morrison 过渡层的层序地层学重新解释

J-5 不整合最初被描述为发生在怀俄明州上侏罗纪风山砂岩底部，它将下伏的红水页岩与上覆的莫里森组隔开。这种不整合的存在受到质疑，Windy Hill 砂岩沉积环境的紧密耦合问题也受到质疑。在本文中，我们记录了 Redwater-Windy Hill-Morrison 过渡的相和结构。相分析表明，风山砂岩代表了一个以潮汐为主的三角洲系统，它向北进积穿过红水页岩的陆架泥岩，然后是莫里森组的沿海平原。现代韩国的汉江三角洲与风山砂岩非常相似。Windy Hill 砂岩的底部不是不整合面；反而，它是顺应的和时间越过的，沿着沉积倾角向北变得更年轻，这意味着红水页岩和莫里森组的部分是同时期的。对怀俄明州 J-5 不整合面的重新解释，以及对突然地层接触是如何在地层学上形成的、它们如何被识别以及不整合是如何在静海和构造上产生的，都表明对 Pipiringos 和 O '沙利文不合格是有道理的。此外，对高位系统域中潮汐控制三角洲的认识强调了越来越拒绝层序地层范式，即波浪主导的海岸主要在进积期间形成，而潮汐主导的海岸在此期间受到限制或有利的过犯。