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Other images in Credit River Fossils from Streetsville, Ontario (Georgian Bay Formation, Upper Member)

Stromatocerium huronense

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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.

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Photo Information for Stromatocerium huronense

Taken with Apple iPhone 6

  • 4.2 mm
  • 1/30
  • f f/2.2
  • ISO 50
View all photo EXIF information


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