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Found 8 results

  1. Hello, I want to put together some pics of some of the reef material that I have found in Streetsville, Mississauga, Ontario on the banks of the Credit River. It is now winter and I am missing the warm days in which I can go and wade in the warm waters of the river for fun. I just want to compile and share some specimens that whose photos I have not shared with. All the fossils belong to the Georgian Bay formation, Upper Member, which is late Ordovician in age. First is the common coral that displays an enormity of growth forms, Favistella alveolata (Goldfuss, 1826).
  2. Stromatocerium huronense

    From the album Georgian Bay Formation Outside of Toronto, Ontario

    Stromatocerium huronense (Billings, 1865) Late Ordovician stromatoporoid sponge. Found along the Credit River at Streetsville, Mississauga, Ontario. Collected as a loose specimen, most likely coming from the Stromatocerium reef of the exposure this came from. Georgian Bay formation, late Ordovician. There is a tiny Favistella alveolata coral colony growing on the edge of the specimen, perhaps this was a commensalistic relationship? Specimen is 12 cm long. However this species in the exposure where it came from can grow beyond a foot in diameter as mounds.
  3. Favistella alveolata

    From the album Georgian Bay Formation Outside of Toronto, Ontario

    Favistella alveolata (Goldfuss, 1826) Found as a loose specimen at an exposure at the Credit River on Streetsville, Mississauga, Ontario. Late Ordovician, Georgian Bay formation. A rugose colonial coral. Coral approximately 10 cm excluding extra matrix.
  4. Stromatoporoid Growth Forms?

    Lately if you have seen some of the topics I've started, these trips revolve around an Ordovician reef I came across by the Credit River in Mississauga, Ontario. One of the few things I discovered while exploring these spots is that there are plenty of Stromatocerium sponges which I red is a stromatoporoid. My question is, can anyone lead me to any papers about the growth forms of Ordovician stromatoporoids? I have found specimens of stromatoporoids and from the way I see it, some of the specimens I found of the same species have different growth forms. Some have those things they call monticules on the surface, and some don't exhibit them at all. Instead these specimens exhibit cracks and splits on the surface of the organism with irregular bumps and overgrowths. I'd like to know what causes this. Some of these sponges, from what I have collected, colonize some pieces of Prismostylus on the top.
  5. Yesterday, after countless trips and exploring at the same old spots on the Credit River in Mississauga, Ont., I finally mustered the courage to go and wade on the water to an isolated exposure out the Georgian Bay Formation at Streetsville, Mississauga. I wanted to collect fossils that were not worn out as these were all I was finding in my old spots. I have been setting my eyes on this exposure from the other side of the Credit River for some time now ever since I started collecting along the Streetsville area and it could possibly harbour fresh material. The temperature of the afternoon was around 16-20 degrees Celsius so the water was not chilly as I was expecting it to be. I crossed the water barefoot with the water reaching up my knees at this tributary that separated the exposure from the main path. The Credit has many tributaries flowing and where the these tributaries converged the river, many exposures can be found along these places. After crossing I reached the other side without slipping on the slimy bottom. The exposure had thin footing for exploration but I was able to walk back and forth without slipping onto the water.
  6. Favistella sp.

    From the album Georgian Bay Formation Outside of Toronto, Ontario

    Favistella sp. (alveolata or calicina?) coral from the Credit River near Streetsville, Mississauga. Georgian Bay Formation, Streetsville Member, late Ordovician. Found as a loose specimen by the banks of the Credit River. This colonial rugose coral is very abundant along the site with many small loose colonies. Some colonies can be found on a limestone matrix. Please click on image sizes to see details of the corallites.
  7. Side Views of the Prismostylus sp. Specimen

    From the album Georgian Bay Formation Outside of Toronto, Ontario

    Side view of the Prismostylus sp. specimen. Credit River near the Streetsville area, Mississauga, Ontario. Georgian Bay Formation, Streetsville Member. Late Ordovician.
  8. Prismostylus sp.. (huronense?)

    From the album Georgian Bay Formation Outside of Toronto, Ontario

    Prismostylus sp. found near Streetsville, Missisauga, Ontario by the banks of the Credit River. Top view of specimen. Georgian Bay Formation, Streetsville Member, late Ordovician, Katian. Formerly called Tetradium, this algae was very common to find in the locality I found this in. Small fragments of this algae can be observed on the limestone but I have seen some specimens that are wider than 20-25 cm in diameter. This specimen is a fragment and is around 15 cm at its widest point.