Where did scientists focus radar mapping for subsurface structures of ancient shorelines?

Answer

Hellas Planitia region

The analysis of advanced radar data specifically targeted the southern plains of Mars, with a primary focus area being the Hellas Planitia region. Scientists utilized this remote sensing technique to penetrate surface layers and map distinct subsurface structures. The patterns observed within this region, when interpreted, suggested the presence of layered sediments and sedimentary features. These structures are significant because they correlate strongly with processes characteristic of wave action and coastal formation observed here on Earth, leading researchers to infer the former existence of standing bodies of water at those elevations.

Where did scientists focus radar mapping for subsurface structures of ancient shorelines?
MarsGeologyoceanBeachesplanet