 Over the next 11,000 or so years, the region's climate slowly warmed, and forests began to replace the original tundra.Several different cultures -- known as the Sylvan Lake, River, Middlesex, Point Peninsula, and Owasco cultures -- replaced the Laurentian culture over time.By the time of the Owasco culture, around 0 AD, maize and beans were being cultivated in the Adirondack uplands.