A first attempt to directly overly Bouguer gravity anomaly data on the topography of Connecticut. I'm not entirely convinced I got these lined up correctly, but they should be close.
Green in the gravity data indicates a low/negative anomaly, while red indicates a positive anomaly. If we assume these are solely due to thickness variations of the underlying crust, this suggests there's a significant thinning of the crust on the western side of the central Hartford Basin( crustal rocks having a lower density than mantle rocks, so low anomalies should indicate thicker crust).