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
Lake Champlain and St. Lawrence Junction Railway pulling delivery wagons. The line was leased to the Canadian Pacific Railway in 1887 and survived into the 21st century as part of the CPR Farnham Division. Lake Champlain and St. Lawrence Junction Railway The Lake Champlain and St. Lawrence Junction Railway was a historic Canadian narrow-gauge railway operating in the Richelieu River valley of Quebec. The 1871 charter of the Philipsburg, Farnham and Yamaska Railway Company was renamed in 1875 and commenced operation between Stanbridge and Saint-Guillaume in October 1879. The line was leased to the South Eastern Railway (SER) in 1880. The rail line and locomotives were converted