In this paper a brief summary of a magnetic survey of the Canon City, Colorado area is presented. The primary object of the article is to give the results of magnetic traverses over exposed igneous pipes which contain an appreciable amount of magnetite. These traverses reveal a magnetic low near the geometric center of the tops of the pipes. Away from the center the field increases in intensity and reaches its maximum strength along the southern edge of the intrusion. Small igneous pipes at or near the surface cause radical changes in the magnetic field within very short distances.

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