Which New York location has surface bedrock that consists mainly of anorthositic rock?

The location in New York with surface bedrock primarily consisting of anorthositic rock is the Adirondack Mountains. This region features a unique geological composition, with anorthosite being a significant part of its crust. The rock is notable for its light-colored plagioclase feldspar, giving the mountains their distinctive appearance. The Adirondacks are also recognized for their ancient geological history, dating back over a billion years.