Manitoulin Fossil 6 Macro

The marine fossils on Manitoulin Island, Ontario, are associated with two geological periods, the Upper (Late) Ordovician (approx. 460.9 to 443.7 million years ago) and the Lower (Early) and Middle Silurian (443.7 to 422.9 million years ago). At this time, the island was near the equator and covered with shallow tropical seas. The fossils I have found, particularly at Janet Head and rocky Cunningham Bay, tend to be either Bryozoan colonies or Favosites (Tabulate Corals; that is, polygonal honeycomb corals or polygonal wagon wheel corals). Others I can't identify. This, I’ve been told, is part of a Horn Coral, also known as a Rugose (wrinkled) coral.