Well, I agree with Horton that the dark vertical stripes appear to be sand, it is the same dark material we have been seeing all over the place, even in the forground of Horton's image in post 34.
But, why is it forming sharply defined vertical bands? IT seesm to be flowing from the cracks in the material above the cliff, that seems obvious, but why doesn't the wind blow it around or even blow it away? It seems to be sticking to the cliff somehow, I don't have any guess for what is going on there.
Well, one possibility is that the sand flow is very active, that is there is significant replacement flow daily. The dark material spills and flows just like a stream or spring does, But, that would be very active indead. The wind keeps cleaning the material away and then new material spills down and forms these dramatic vertical bands.
I also agree that the spherules density follows the bedding planes., I think they were depositied IN the beds orginally, which would explain that nicely, but then how they formed is a complete mystery, unless they are biogenic.
Horton, what do you mean by "What else do I know that behaves that way?" What else DOES behave that way? Are you sugesting they are biogenic or is there something else you are hinting at?
