5. Westboro Beach
Stromatolites, orthocones and trace fossils fossils
Kitchissippi Lookout parking lot, off Ottawa River Parkway, Ottawa, Ont.
Stromatolites are biosedimentary structures built up during sedimentation by cyanobacteria and blue-green algae. Layers were built up as the cyanobacteria grew up through successive depositions of lime muds to create rounded, domed structures. At Westboro Beach, the bedrock shows vertical cross-sections through these fossils. The fossils here are lined up with those seen in plane view near the Québec side of the Champlain Bridge.