Guidebook for field trips

Of the Precambrian geology of northeastern Minnesota / G.M. Schwartz -- Landforms and glacial history of northeastern Minnesota / H.E. Wright, Jr. -- Northeastern Minnesota and the Lake Superior Precambrian correlations / Ralph W. Marsden -- The Duluth gabbro complex -- First day, October 28, 1956 -- Summary and log / S.S. Goldich and R.B. Taylor -- The Duluth gabbro complex, Duluth, Minnesota / Richard B. Taylor -- Geology of the Enger Tower area, Duluth, Minnesota / S.S. Goldich, R.B. Taylor, and F.J. Lucia -- Copper-nickel in the Duluth gabbro near Ely, Minnesota / Gerald E. Anderson -- Vermilion range and Eastern Mesabi range -- Second day, October 29, 1956 -- Summary and log / S.S. Goldich and T.E. Stephenson -- The Vermilion range / I.L. Reid -- Geology of the Soudan mine and vicinity / Fred L. Klinger -- Geology of the Ely trough / I.L. Reid -- Mineral zones in the Zenith mine / Josiah Royce -- The taconite industry / George M. Schwartz -- Central Mesabi range -- Third day, October 30, 1956 -- Summary / Ralph W. Marsden -- Auburn mine -- Stop No. 12 / William Holway -- Enterprise and Alpena mines -- Stop No. 13 / John S. Owens -- Monroe-Tener mine -- Stop No. 14 / Wayne L. Plummer -- Hull-Rust-Mahoning mine -- Stop No. 15 / Wayne L. Plummer -- The Mesabi range / John W. Gruner -- Judson mine / Jack V. Everett -- Direct leaching of quartz to form Mesabi ore from lean iron formation / Thomas E. Stephenson -- History and statistics pertaining to the iron mining industry of Minnesota / H.H. Wade.