| Description (summary) |
2003-08-05 |
jl |
This picture shows the successive layers of laminations f413 continuing underneath the brown material f415. This proves that the brown material is later than the laminations. It is unlikely that the brown material is melted soil deposited by the rains over the past winter, since very little water got in this year. It is possible that it is ancient fissure melt, although the process would have needed to have happened regularly to explain both the vertical and horizontal layering of f415. In that vein, it is possible that f415 is the result of multiple events, like the individual laminations themselves, but in this case, we cannot perceive the layers, due to the nature of the accumulation. v233a is a closeup of the layers themselves. [Input: N805JL.j] |