The trench inside the "sand-drift" - Sol 72

Caption NASA originale:"(...) This scar allows the Rover's instruments to see below the drift surface, to determine the composition of its materials. Initial results indicate that the drift material is similar to the basaltic sands that have been seen throughout Spirit's journey to Bonneville.
The material DOES NOT seem to be the same as that inside the Crater.

Two questions raised by these results are: why is the dark sand in the Crater not the same as the dark sand in the drift? And why are there two different dark soil-type deposits in such a small place?".

Forse perchè il Cratere Bonneville NON E' quello che si pensa (e cioè un Cratere da Impatto)...E, a proposito, ma dove è finito l'Heat-Shield? Da questa ripresa dovremmo comunque essere in grado di vederlo...