AbstractsPhilosophy & Theology

A summary of the theories of the origin of the Lake Superior copper ores, with evidences pertaining thereto

by Eva Endurance Hirdler

Institution: Missouri University of Science and Technology
Year: 1911
Record ID: 1519158
Full text PDF: http://hdl.handle.net/10355/26032


"In each of the foregoing theories we obtain sound reasoning in connection with many facts. Therefore a correlation of these facts ought to give us enough material to deduct a sound theory. The most plausible supposition seems to be that all metallic ores are derived ultimately from the interior of the earth, from a great metallographic province, when they are delivered by igneous eruptives near or at the surface" – Conclusion With Reasons, p. 29.