The Geological and Natural Hqistory Survey of Minnesota. The Twenty-third Annual Report, for the year 1894

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Science  26 Jul 1895:
Vol. 2, Issue 30, pp. 107
DOI: 10.1126/science.2.30.107-a


IN the review of the Twenty-third Annual Report of the Geological Survey of Minnesota, etc., in SCIENCE of July 5, p. 23, first column, near top, the Keewatin rocks are referred to the Upper Algonkian, of the U. S. Geological Survey, whereas they should have been referred to the Lower division.