Doesn't seem plausible. Some of the positives are the same dark color as the halo on some of the negatives. The rock looks to me like its all the same tan color underneath.

Also, take a look at the hires:

https://upload.wikimedia.org/wikipedia/commons/f/f4/SantaCru...

A the top center you will see a couple of positives that overlap each other. How did that happen?