Fascinating, Bob.

I'm not sure I'd have used the word "anomalous" to describe it. My first thought was confirmed by the caption:

The dramatic differences between the infrared and visible views of White Rock are the result of solar heating. The relatively bright surfaces observed at visible wavelengths reflect more solar energy than the darker surfaces, allowing them to stay cooler and thus they appear dark in the infrared image.

On the surface, it's pretty straightforward. But then, this is White Rock, a feature that's captured my imagination and that of a lot of other people. I know it's pure emotion, and emotion has no place in science (oh yeah, right!), but I was disappointed by the bland duricrust explanation that banished the mystery to the oblivion of the mundane. It's great that the question of its nature has been reopened by new data.

Thanks!

--Robert