Champlain Valley southward into the Valley of Vermont. The Vermont Lowlands are primarily underlain by sedimentary rocks, especially limestone and shale, though metamorphic rocks such as marble and slate are also present. Lake Champlain is situated in the Champlain Valley between the Green Mountains of Vermont and the Adirondack Mountains of New York, drained northward by the Richelieu River into the St. Lawrence River at Sorel-Tracy, Quebec (northeast of Montreal). Major tributaries of Lake Champlain include Otter Creek and the Winooski, Missisquoi, and Lamoille rivers in Vermont, and the Ausable, Chazy, Boquet, and Saranac rivers in New York. Lake Champlain also receives
Samuel de Champlain growth of New France in the St. Lawrence River valley until his death in 1635. Champlain is memorialized as the "Father of New France" and "Father of Acadia", and many places, streets, and structures in northeastern North America bear his name, or have monuments established in his memory. The most notable of these is Lake Champlain, which straddles the border between northern New York and Vermont, extending slightly across the border into Canada. In 1609 he led an expedition up the Richelieu River and explored a long, narrow lake situated between the Green Mountains of present-day Vermont and the Adirondack