In the geologic timescale, the Roadian is an age or stage of the Permian. It is the earliest or lower of three subdivisions of the Guadalupian epoch or series. The Roadian lasted between and  million years ago (Ma). It was preceded by the Kungurian and followed by the Wordian.

In the geologic timescale, the Roadian is an age or stage of the Permian. It is the earliest or lower of three subdivisions of the Guadalupian epoch or series. The Roadian lasted between and  million years ago (Ma). It was preceded by the Kungurian and followed by the Wordian.