In a recent contribution G. Shanmugam (2018) discusses and neglects the importance of hyperpycnal flows and hyperpycnites for the understanding of some sediment gravity flow deposits. For him, the hyperpycnal flow paradigm is strictly based on experimental and theoretical concepts, without the supporting empirical data from modern depositional systems. In this discussion I will demonstrate that G. Shanmugam overlooks growing evidences that support the importance of hyperpycnal flows in the accumulation of a huge volume of fossil clastic sediments. Sustained hyperpycnal flows also provide a rational explanation for the origin of well sorted fine-grained massive sandstones with floating clasts, a deposit often wrongly related to sandy debris flows.

中文翻译：

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新知识写在沉积岩上——评论 Shanmugam 的论文“高重岩问题”

在 G. Shanmugam (2018) 最近的一篇文章中，讨论并忽略了超重心流和超重心岩对于理解某些沉积物重力流沉积物的重要性。对他来说，超重流范式严格基于实验和理论概念，没有来自现代沉积系统的支持经验数据。在本次讨论中，我将证明 G. Shanmugam 忽略了越来越多的证据，这些证据支持超重流在大量碎屑化石沉积物的积累中的重要性。持续的超重流也为具有漂浮碎屑的分选良好的细粒块状砂岩的起源提供了合理的解释，这种沉积物通常与砂质碎屑流错误地相关。