Research within the Anthropocene has recently highlighted substantial anthropogenic stratal modification, particularly evident in the Arctic, due to the profound and spatially extensive destruction and removal of inorganic matter from the environment. However, there is a lack of research on the socio-political dimensions of Anthropocene stratigraphy in relation to different regimes of geological knowledge production and conceptualization of deep time and matter. Driven by the 'geological turn' in the social sciences, this paper investigates the ecological and socio-political multidimensionality of Anthropocene stratigraphy conceptualization through an analysis of the fluid relations between inorganic matter, cultural politics, indigeneity, and geopolitical governance in the Russian Arctic. Through selected case studies, this paper discusses the multidimensional encounters between geologists, state institutions, and indigenous people regarding the discovery and categorization of minerals. Scientific approaches to geos are further juxtaposed against indigenous understandings of geological phenomena, which are encompassed within indigenous non-anthropocentric cosmologies of the subterranean world and their systems of values grounded in the fluid dynamics of interaction with diverse environmental forces.