Cemented gravel. . . hardrock in the making

Sunday, May 24, 1998

Cemented gravel is found in gravel pits around southern Ontario. Glacial outwash gravels are cemented together with calcite mobilised by groundwater percolating through the gravel. This example may be seen by taking Highland Road from Kitchener towards Baden. The Highland Aggregates pit is on your right. This large piece of cemented gravel is seen at the entrance to the gravel pit. In other parts of southern Ontario calcium is also deposited around the roots of trees. Good examples are found in the Paris area.

gravel
gravel close up