File:AS17-150-23038 (21373736983).jpg

Apollo 17 Hasselblad image from film magazine 150/LL - Lunar orbit.
Part of this photo was used in Figure 28-13 of the Apollo 17 Preliminary Science Report (SP-330, 1973), which has the following caption:

Picard crater in western Mare Crisium.

The text of the report states:

Picard Crater, 30 km in diameter, is located in western Mare Crisium and displays a somewhat dark rim (fig. 28-13). Although the crater appears to be younger than the surrounding mare material, there are no rays and crater chains associated with its relatively smooth ejecta blanket. Detailed study of its characteristics from orbit was planned to aid in deciphering its origin. The similar, but smaller, Peirce Crater to the north was also studied for the same reason. The most obvious first question was related to the color of their rim deposits relative to the surrounding mare:

All those dark and light albedo changes around Picard and Peirce are not obvious at this particular angle yet. There is some hint of them...We are just about over the top of Picard; and the rim materials, which go out about a third of a crater diameter, as near as I can tell, are distinctly darker but not by much. They are more gray than the gray tan, or tannish gray of the rest of the mare. (LMP, rev 1)

Coming up at Picard now. Looking at it, a little bit from a distance, there is a darker albedo that goes about one-half a crater diameter. And then, on top of that darker albedo, it only goes out maybe a fourth of a crater diameter, there is a lighter-type material that seems to be covering it up. The lighter-type material though only goes in a generally westerly, from the south around to the west side and then from the northeast around to the northwest side, and it leaves the dark material draping down on the east side of Picard.

You can pretty well carry a light layer in the top portion of the wall all the way around to that part where the light part stops. And then you come to a dark layer again. And then, as you continue around from the west to go to the north side, it is a little bit in shadow on the east side, so I cannot tell for sure whether that light layer is in there or not. But starting on the south side, going around to the west again, you can see a layer of dark material, although there does not seem to be a change in the slope or the inner wall of the crater.

Just below the dark layer, there is a change in slope a little bit. It maintains that slope all the way down to the crater floor, where you get into the slump blocks. And then in the center of the crater, it looks like a mare-like fill with, I am about to lose sight of it again, something comparable to a central peak in it. (CMP, rev 24)