What's all over Hyperion? (extra-detail mgnf)

Caption NASA:"This is a color map of the composition of a portion of Saturn's moon Hyperion's surface about 75 Km (approx. 45 miles) on a side.
In this map, blue shows the maximum exposure of Frozen Water (H2O), red denotes Carbon Dioxide (CO2) ice ("dry ice"), magenta indicates regions of Water plus CO2, yellow is a mix of CO2 and an unidentified material.
This map was made with data from the Visual and Infrared Mapping Spectrometer aboard the Cassini spacecraft during its flyby of Hyperion in September 2005".