New research supports theorized intermittent ocean exiting Mars’ giant Valles Marineris canyon

Theorized ocean from 2019 & 2022 papers
Scientists studying the deltas of debris that exist at the base of the cliffs inside Mars’ giant Valles Marineris canyon have concluded the deltas suggest the existence of an ocean there about three billion years ago.
The theorized ocean on the map to the right comes from research published in 2019, with additional support published in 2022. This new work supports those conclusions. From the press release:
At the lower end of the canyon system, so-called “scarp-fronted deposits” were discovered, which are interpreted as “fan deltas”. Fan deltas form where a fan-shaped cone of debris and sand grows directly into a standing body of water. The researchers found that the structures mapped on Mars are very similar to classic deltas on Earth.
…The results also show that the ocean found was at least as large as the Arctic Ocean on Earth. Schlunegger says: “We are not the first to postulate the existence and size of the ocean. However, earlier claims were based on less precise data and partly on indirect arguments. Our reconstruction of the sea level, on the other hand, is based on clear evidence for such a coastline, as we were able to use high-resolution images.”
You can read the new paper here [pdf]., which I strongly suggest as the press release at the link above is very poorly written. The 2019 and 2022 work focused on computer models and the geological features in the region of the theorized ocean, including evidence of possible past tsumanis. This new research focuses on the debris piles at the base of Valles Marineris’ cliffs, all of which appear to end at similar elevations. As this new paper notes:
» Read more

Theorized ocean from 2019 & 2022 papers
Scientists studying the deltas of debris that exist at the base of the cliffs inside Mars’ giant Valles Marineris canyon have concluded the deltas suggest the existence of an ocean there about three billion years ago.
The theorized ocean on the map to the right comes from research published in 2019, with additional support published in 2022. This new work supports those conclusions. From the press release:
At the lower end of the canyon system, so-called “scarp-fronted deposits” were discovered, which are interpreted as “fan deltas”. Fan deltas form where a fan-shaped cone of debris and sand grows directly into a standing body of water. The researchers found that the structures mapped on Mars are very similar to classic deltas on Earth.
…The results also show that the ocean found was at least as large as the Arctic Ocean on Earth. Schlunegger says: “We are not the first to postulate the existence and size of the ocean. However, earlier claims were based on less precise data and partly on indirect arguments. Our reconstruction of the sea level, on the other hand, is based on clear evidence for such a coastline, as we were able to use high-resolution images.”
You can read the new paper here [pdf]., which I strongly suggest as the press release at the link above is very poorly written. The 2019 and 2022 work focused on computer models and the geological features in the region of the theorized ocean, including evidence of possible past tsumanis. This new research focuses on the debris piles at the base of Valles Marineris’ cliffs, all of which appear to end at similar elevations. As this new paper notes:
» Read more









