Altered Tuffs in the Ordovician of Minnesota

• 1 April 1929
• journal article
• Published by University of Chicago Press in The Journal of Geology
• Vol. 37  (3) , 239-248
• https://doi.org/10.1086/623617

Abstract

Keywords

• ORDOVICIAN OF MINNESOTA
• ALTERED TUFFS IN THE ORDOVICIAN