Greater Sudbury - Geography

Geography

Sudbury has 330 lakes over 10 hectares (25 acres) within the city limits. The most prominent is Lake Wanapitei, the largest lake in the world completely contained within the boundaries of a single city, and which representing 1/3 of the total lake area. Lake Ramsey, a few kilometres south of downtown Sudbury, held the same record before the municipal amalgamation in 2001 brought Lake Wanapitei fully inside the city limits. Sudbury is divided into two main watersheds: to the east is the French River Watershed which flows into Georgian Bay and to the west is the Spanish River Watershed which flows into Lake Huron.

Sudbury is built around many small, rocky mountains with exposed igneous rock of the Canadian (Precambrian) Shield. The ore deposits in Sudbury are part of a large geological structure known as the Sudbury Basin, which are the remnants of a 1.85 billion-year-old meteorite impact crater. Sudbury's pentlandite, pyrite and pyrrhotite ores contain profitable amounts of many elements—primarily nickel and copper, but also platinum, palladium and other valuable metals.

Local smelting of the ore releases this sulphur into the atmosphere where it combines with water vapour to form sulphuric acid, contributing to acid rain. As a result, Sudbury is widely known as a wasteland. In parts of the city, vegetation was devastated by acid rain and logging to provide fuel for early smelting techniques. To a lesser extent, the area's ecology was also impacted by lumber camps in the area providing wood for the reconstruction of Chicago after the Great Chicago Fire of 1871. While other logging areas in Northeastern Ontario were also involved in that effort, the emergence of mining related processes in the following decade made it significantly harder for new trees to grow to full maturity in the Sudbury area than elsewhere.

The resulting erosion exposed bedrock in many parts of the city, which was charred in most places to a pitted, dark black appearance. There was not a complete lack of vegetation in the region as Paper birch and wild blueberry patches thrived in the acidic soils. During the Apollo manned lunar exploration program, NASA astronauts trained in Sudbury to become familiar with shatter cones, a rare rock formation connected with meteorite impacts. However, the popular misconception that they were visiting Sudbury because it purportedly resembled the lifeless surface of the moon persists.

The city's Nickel District Conservation Authority operates a conservation area, the Lake Laurentian Conservation Area, in the city's south end. Other unique environmental projects in the city include the Fielding Bird Sanctuary, a protected area along Highway 17 near Lively that provides a managed natural habitat for birds, and a hiking and nature trail near Coniston, which is named in honour of scientist Jane Goodall.