“…That boundary may delineate one of the most important brittle faults in the region. Known brittle faults of the Manhattan prong include the 125 Street fault that extends across upper Manhattan to Queens, several other faults in New York City, and the Dobbs Ferry fault farther north in Westchester County (Isachsen and McKendree, 1977;Baskerville, 1982;Fluhr and Terenzio, 1984). Geologic mapping in New York City water tunnels and other field studies indicate that these northwesterly striking brittle faults are the youngest structural features in the region (Merguerian, 2004).…”