The article proposes a reading of the chapter “10000 BC. The Geology of Morals (What does the Earth think it is?)” from the perspective of an ontology of space. We will deal specifically with the concept of stratum. In the first and second paragraphs we will show that every strate is composed of both material and semiotic aspects. In order to do so we will develop some notions of geology and lingüistics used by the authors. Then, paragraphs 3, 4 and 5 will deal, succesivelly, with the concepts of substratum, epistratum and paraestratum. Three fundamental aspects of actual space are configured in the articulation of these three concepts: territorialization, relative deterritorialization and codification/decodification. This tipology of strates gives an account of spatial diversity (material and semiotic) and it will be studied through some of the sources utilized by Deleuze and Guattari. The thought of Pia Laviosa Zambotti will receive special attention since her work is an essential source of the tipology of strates. Some aspects of the thoughts of Jacques Monod and Jakob Von Uexküll will also be taken into account, especially those concerning the concept of umwelt and paraestratum.