Seasonal and historical transformations of ice and permafrost suggest that the Mackenzie Delta in Arctic Canada can be understood as a solid fluid. The concerns and practices of delta inhabitants show that fluidity and solidity remain important attributes in a solid fluid delta. They are significant not as exclusive properties, but as relational qualities, in the context of particular human projects and activities. Indigenous philosophies of ‘the land’ and Henri Lefebvre’s notion of ‘tempo’ in Rhythmanalysis: Space, Time and Everyday Life (2004) may help to illustrate the predicament of living in a world that is solid and fluid rhythmically, and in relation to particular practices. Economic, political, sociocultural and physical transformations can all be experienced as both solid and fluid, depending on the degree to which they resonate with people’s purposes. In a world where everything seems to be changed and changing, solidity and fluidity may best be seen as indications of relative differences in tempo.

冰和永久冻土的季节性和历史变化表明加拿大北极的麦肯齐三角洲可以被理解为固体流体。三角洲居民的关注和实践表明，流动性和坚固性仍然是固体流体三角洲的重要属性。在特定的人类项目和活动的背景下，它们不是作为排他性的属性而是作为相关品质的重要意义。“土地”的本土哲学和 Henri Lefebvre 在节奏分析中的“节奏”概念：空间、时间和日常生活(2004) 可能有助于说明生活在一个有节奏的固体和流动的世界中的困境，并与特定的实践有关。经济、政治、社会文化和物质变化都可以体验为固体和流动，这取决于它们与人们的目的产生共鸣的程度。在一个一切似乎都在变化和变化的世界里，坚固和流动最好被视为节奏相对差异的迹象。