Is “Atikokania lawsoni” a Concretion


WHEN your letter of November 23, 1914, enclosing a note by Mr. George Abbott on the silicified structures described in Memoir No. 28 of the Geological Survey of Canada as Atikokania lawsoni, reached me on December 8, I had on my table a copy of NATURE of January 29, 1914, containing the note on “Zonal Structure in Colloids,” by Mr. Abbott. Prior to meeting with this article, I did not know of the remarkable structure of the Sunderland Magnesian Limestone, or I should have certainly directed attention to it.

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WALCOTT, C. Is “Atikokania lawsoni” a Concretion. Nature 94, 478 (1914).

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