Publisher's Synopsis
Excerpt from The Age and Origin of the Gypsum, Deposits of Central Iowa: A Dissertation Submitted to the Faculty of the Ogden Graduate School of Science, in Candidacy for the Degree of Doctor of Philosophy, Department of Geology
Stassfurt, Sperenberg (gypsum Kansas (salt and gypsum) and salt). Oklahoma and Indian Territory. South Tyrol (gypsum). Black Hills (gypsum)'5 Russia (gypsum, salt).
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