Much of that darker material is SLA-561V and ash
Much of that darker material in the photo is SLA-561V and ash that got blown out of the heat shield after it augered-in. If you look at the color versions of this picture, you can see the characteristic dark orange color of SLA-561V (cork dust in resin). I'll be surprised if the planetary scientists learn much from this picture. However it has been fun for us engineers.
Gary