Epigeus (crater)

Epigeus is the largest known impact crater on Jupiter's Galilean satellite Ganymede, with a diameter of 343 km.

[1] At the center of Epigeus, there is a 25-km-radius region of sub-radial dark-floored troughs or fractures.

These troughs range from approximately 150 to 250 m across, are generally linear, and merge in dendritic or anastomosing patterns.

This bright region consists of massifs 200 to 300 m across separated by 200 to 300 m. The outer ring is a complex zone corresponding to a crater diameter.

The smooth units in the center and between the inner and outer rings may be a solidified impact-melt sheet.