Abstract
An anomalous region has been identified on Mars from the 1971 and 1973 Earth-based Goldstone radar data. This region is characterized by coincident very high radar reflectivities, and unusual smoothness. Very few realistic surface morphologies can generate such return-signals. Liquid water within ∼50–100 cm of the surface is one possibility, an interpretation strengthened by an apparent seasonal variation in surface reflectivity for the same locality.
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Zisk, S., Mouginis-Mark, P. Erratum: Anomalous region on Mars: implications for near-surface liquid water*. Nature 288, 735–738 (1980). https://doi.org/10.1038/288735a0
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DOI: https://doi.org/10.1038/288735a0
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