A Geology of Media argues that media are not immaterial systems of signs, interfaces or information, but geological formations dependent on minerals, metals, energy, extraction, waste and deep planetary time. Jussi Parikka expands media archaeology beyond obsolete devices and technical histories by asking where media come from materially and where they go after use. Computers, networks, screens, batteries and data infrastructures depend on copper, lithium, rare earths, coltan, oil, coal, plastics, water, labor and toxic disposal. Media culture is therefore inseparable from geology, mining, military logistics, global capitalism and environmental damage. Against a narrow idea of media materialism focused only on machines, circuits or code, Parikka proposes a geophysical media theory: the digital is grounded in the earth. The book links media studies with the Anthropocene, or “Anthrobscene,” showing how technological culture participates in planetary transformation through extraction, energy consumption and electronic waste. It also develops the concept of “medianatures,” where nature and media are not separate domains but co-produced assemblages of minerals, bodies, infrastructures, images, signals and labor. Artistic practices, psychogeophysics, earthquake sonification, satellite imagery, zombie media and circuit bending become ways to sense these hidden material layers. The book’s strongest contribution is to shift media theory from representation and communication toward planetary materiality, revealing that every digital device carries geological histories and ecological futures. Its conclusion is that media must be understood through deep time, political economy and environmental responsibility: not only as cultural technologies, but as extractive, energetic and toxic arrangements embedded in the earth.