Some peculiarities
on the way along the Delta

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Many
"young" tectonic fault lines in the foreland of the Delta.
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Tectonic fault line
(not a channel)
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Fragments from the eroded ash deposits of the
delta


The rover is approaching the delta and has photographed
more interesting details at sol-397. Surprisingly, a number of rounded
stones have been documented, which normally signal activities
of flowing water. A broken stone, however, allows a completely different conclusion.
It is a hollow stone of two chambers filled with dust (?).
We can therefore assume that the rounded stones
are volcanic geodes.




A closer look at these new photos suggests an
assemblage of volcanic rocks such as laminated ash and remains of lava. Nothing
is fluvial.



This laminar structured deposits clearly
consist of volcanic ash particles
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It seems to be lava
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Cyclically deposited ash layers
of varying hardness and modeled by wind erosion
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A small igneous ultramafic boulder
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Another ultramfic rock on the way shows reflections or bright inclusions
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Wonderful examples of coarse ash deposits

Another example of layered tiny-grained ash deposits
No chance to find fluvial sediments

These could be the basal ash layers of the eroded
delta

This photo of the delta scap at sol 427 repeatedly
documents a local unconformity over tilted ash deposits. Cross-bedding,
as we know it in fluvial deposits, is not plausible.
Rather, it can be assumed that there was a time gap during the spread
of the dry ice glacier. The older and tilted block was caused by an other
szenario (Transport ?).
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Sol-453: Here are to see some vertical cracks caused
by a transport of the blocks

Now also is clear that the compact slabs
above is also of ash.The holes are caused by wind erosion.
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Sol-458: An impressive example with cracks in
a non-sedimentary rock slab caused by movement energy.
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