Report of progress in the counties of York, Adams, Cumberland, and Franklin. Illustrated by maps and cross-sections showing the magnetic and micaceous ore belt near the western edge of the Mesozoic sandstone and the two Azoic systems constituting the mass of the South mountains. With a preliminary discussion on the Dillsburg ore bed, and a catalogue of specimens collected in 1875.
Pub. by the Board of commissions for the Second geological survey,
|Series:||Pennsylvania. Geological survey, 2d. [Report of progress
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