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Ancient Mars: Evidence of Liquid Water Found

2/2/2026

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Summary

Story summary

The scarp frontal deposits in Coprates Chasma mark Mars' highest sea level about 3.37 billion years ago at the Late Hesperian–Early Amazonian boundary.
The study traces sedimentary processes from origin to deposition and shows that fluvial erosion carved the Promontory and formed fan deltas.
Evidence indicates substantial water availability, with inferred sea level fluctuating near -3700 meters.
These findings enhance understanding of Mars' past habitability by documenting liquid-water conditions.

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Story summary

The scarp frontal deposits in Coprates Chasma mark Mars' highest sea level about 3.37 billion years ago at the Late Hesperian–Early Amazonian boundary.
The study traces sedimentary processes from origin to deposition and shows that fluvial erosion carved the Promontory and formed fan deltas.
Evidence indicates substantial water availability, with inferred sea level fluctuating near -3700 meters.
These findings enhance understanding of Mars' past habitability by documenting liquid-water conditions.