Is “Atikokania lawsoni” a Concretion?


HAS a mistake not been made in Memoir No. 28 of the Geological Survey of Canada? Dr. C. D. Walcott therein describes certain silicified structures in the Steeprock Limestone of Lake Ontario which he names Atikokania lawsoni. He considers they represent “a group of organisms related to the sponges,” or else corals like the Archæocyathin..

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ABBOTT, G. Is “Atikokania lawsoni” a Concretion?. Nature 94, 477–478 (1914).

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