We could see into the shadows, but it was difficult.] [Aldrin, from the 1969 Technical Debrief - We could see very small gradations in color (and brightness) that were the result of very small topographical changes.] [Armstrong, from the 1969 Technical Debrief - Of course, when we actually looked at the material, particularly the silt, up close, it did, in fact, turn out to be sort of charcoal