TIOUGHNIOGA STAGE

division of Devonian rocks and time in North America (the Devonian Period began about 395,000,000 years ago and lasted about 50,000,000 years); it precedes the Taghanic Stage and follows the Cazenovian Stage. Rocks of the Tioughnioga Stage in New York compose the upper half of the Hamilton Group and consist of the Kiskatom Redbeds in the eastern part of the state, the Panther Mountain Sandstone in the central part of the state, and various shales to the west, including the Moscow Formation and the underlying Ludlowville Formation. Limestones of the Tioughnioga Stage occur in central and western North America.