Sulcus (geology)

Sulcus /ˈsʌlkəs/ (pl.: sulci /ˈsʌlsaɪ/) is, in astrogeology, an area of complex parallel or subparallel ridges and furrows on a planet or moon.

For example, Uruk Sulcus is a bright region of grooved terrain adjacent to Galileo Regio on Jupiter's moon Ganymede.

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