Erosion
Erosion was the geological process by which rock wore away over a protracted period of time.
An impact crater on the planet Terra Nova was partially filled in by erosion over the years. (ENT: "Terra Nova")
Erosion was the geological process by which rock wore away over a protracted period of time.
An impact crater on the planet Terra Nova was partially filled in by erosion over the years. (ENT: "Terra Nova")