A Closer Look at 10 Different Types of Valves. A list containing globes, gates, checks, angles and strainers can only mean weâre taking a closer look at different types of valves. In our discussion of the world of maritime supplies, a detailed listing of valves is a necessary procedure. 10 types of valves.
Canadian Shield. The Canadian Shield, also called the Laurentian Plateau, or Bouclier Canadien, is a large area of exposed Precambrian igneous and high-grade metamorphic rocks that forms the ancient geological core of the North American continent, covered by a thin layer of soil.he Canadian Shield, also called the Laurentian Plateau, or Bouclier Canadien, is a large area of exposed Precambrian igneous and high-grade metamorphic rocks that forms the ancient geological core of the North American continent, covered by a thin layer of soil.
Canadian Shield-a large plateau that occupies more than 40% of the land area of Canada; it extends from the Great Lakes northward to the Arctic Ocean.Laurentian Highlands, Laurentian Plateau. plateau region of eastern Canada extending from the Great Lakes and the St. Lawrence River northward to the Arctic Ocean. The highland formation also covers much of Greenland and forms the Adirondack Mountains in the United States.