The noetic function of mind unique to mankind that allows us to change our practices such that we create new resources is a sort of higher material form that alters human practice. In this sense, higher ordered thoughts have physical expression. The reshaping of the landscape of human technological practice is metaphorically akin to another of Riemann's discoveries: the shockwave function.
So, the principle of geistesmassen can be characterized as operating on separate planes of reality. And in fact, it is not accidental that the notion of a Riemann function that appears on separate sheets of multiply connected manifold of n dimensions was an extension of the monadology of Leibniz. So too, Vernadsky's concept of noosphere builds upon this groundwork.