Yeah, NY throughout the Hudson Valley has shallow soil. The glaciers swept everything clean 21k years ago, dropped it all to form Long Island, and barely any of it has come back.

(Looking it up, the first result says that soil for at a rate of about 0.5-1 inch/millennia, which sounds about right for how much has re-accumulated, on average.)

An anecdote that I've heard is that the NYC skyline and underlying geologic map correlate pretty closely; the skyscrapers were apparently built where the bedrock was conveniently close to the surface.