Geophysical studies confirm that the Hudson Bay region exhibits an anomalously low free-air gravity anomaly, largely driven by postglacial rebound from the Laurentide Ice Sheet and mantle dynamics.
The claim states that the Hudson Bay region exhibits anomalously low gravity. Papers [0] and [3] both discuss free-air gravity anomalies in the Hudson Bay region and explicitly refer to the gravity low (or free-air gravity anomaly low) linked to glacial isostatic adjustment and mantle processes. No papers refute this fact. Therefore, the claim is supported.