Recently posted photos from Danielson holeWhich is located north of the equator of the planet, specifically in the southwest region Arabia Terra.

The area of ​​this hole is very interesting Planetary geologists Because sediment layers sequence occurs there. Here are the most spectacular and best preserved structures. Its height is about 30 meters, while its width is up to 100 meters.

more resistant Stripping The layers form a kind of step and are similar to rice terraces in China, but much larger than them. On the other hand, sediments that are more susceptible to damage create cavities and niches.

this sequence grades They could only have arisen as a result of repeated processes, so there is no doubt about an asteroid collision, for example.

Determining the age of these structures is very difficult, and it is estimated They could have originated millions or even billions of years ago. Then the bulk sediments accumulated at the bottom of the crater layer by layer. Bulk sand is darker on the steps.

It is not yet known exactly how these deposits formed, but the material may have accumulated in annual or even longer sequences.

There are several hypotheses about the processes behind these shapes, including the degrees that may have arisen as a result of cyclic processes that were a consequence of associated climate change. Mars’ orbit changeswind deposition, volcanic flows and lava accumulation.

About crater There is no drainage system, terraces or former deltas, and therefore the possibility of external supply (eg via ancient rivers) is excluded.

Another interesting hypothesis is ground water escalation – Groundwater began to seep through the cracks in the rock caused by the formation of the impact crater, which could flood the formed funnel. This is how the old could have formed LakeAt the bottom of the deposited material.

It will be a long time before we know all the secrets Danielson hole.

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