A summary of the theories of the origin of the Lake Superior copper ores, with evidences pertaining thereto
Institution: | Missouri University of Science and Technology |
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Department: | |
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.