Respuesta :
Answer: They are separated by the thin wedge of the Canadian Shield that extends through the St Lawrence river to the Atlantic Ocean.
Explanation:
The great lakes St. Lawrence lowlands is a physiographic region of eastern Canada and consists of southern Ontario that is bordered by the north of Canadian shields.
- The three great lakes are known as Lake Huron, Erie, Ontario extend to the St. Lawrence river. The bedrocks consist of sediment deposits that are visible in the limestone strata of the Niagara escapement. The lowland region is divvied into the southern, central, and western lowlands.
- The region is located in the southern part of Ontario and Quebec. East of Kingstone thousands island is divided by the Canadian shields the southern Ontario lowlands from the St Lawrence river valley.
Learn more about the Great Lakes St. Lawrence lowlands is actually divided into two parts.
brainly.com/question/21858616.