Buried traces of a long-vanished planetary civilization whose interference with mapping exposes an illegal mining conspiracy.
The alien remnants lie beneath dirt and rock in the regions that satellite and ground mapping failed to record. Their presence, rather than deliberate data deletion alone, causes the original blank patches and confuses mapping equipment. Bharadwaj identifies this explanation from the team's accumulated samples and analysis.
The discovery makes the world archaeologically significant: an official interdict would reserve it for archaeological surveys. GrayCris has therefore hidden the data, sabotaged competing expeditions, and tried to erase every witness so it can excavate and mine the remnants for illegal profit. The precise builders, age, contents, and extent of the ruins remain unknown.
Unseen buried archaeological material beneath the planet's soil and glassy rock, detectable indirectly through anomalous mapping failures and survey samples.
The remnants are the sought-after secret that motivates GrayCris's campaign of sabotage and murder.