Pwyll's visible dark central region is about 26 kilometers in diameter, with a central peak rising to about 600 meters.
Brilliant rays of debris blasted from the impact site extend outward for hundreds of kilometers. The white debris or ejecta clearly overlays everything else on the surface - indicating that this impact crater is younger than all surrounding features. The bright white color suggests a composition of water ice particles.
- "Pwyll". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
- "Red-Blue Three dimensional view of Pwyll crater". Jet Propulsion Laboratory. 1999-01-18. Retrieved 15 December 2012.
- Nemiroff, R.; Bonnell, J., eds. (17 April 1997). "Pwyll: Icy Crater of Europa". Astronomy Picture of the Day. NASA. Retrieved 15 December 2012.