The Point Amour Patch Reefs, Labrador, Canada
The mound-like formations present along this shore are composed of the calcite skeletons
of an extinct group of sponge-like animals called Archaeocyathids (arc-ae-o-sy-athids).
The Point Amour Archaeocyathid reefs, which were formed about 530 million years ago, provide evidence that this region was once a warm sea near equator. The Point Amour Lighthouse, Labrador, Canada