II.—Second Geological Survey of Pennsylvania - 1. Part I. The Northern Townships of Butler County. Part II. A Special Survey made in 1875, along the Beaver and Shenango Rivers. With four Maps and 154 Vertical Sections. By H. M. Chance. - 2. The Geology of Lawrence County. A Report on the Correlation of the Coal-measures in Western Pennsylvania and Eastern

J M J M

doi:10.1017/s0016756800148149

II.—Second Geological Survey of Pennsylvania - 1. Part I. The Northern Townships of Butler County. Part II. A Special Survey made in 1875, along the Beaver and Shenango Rivers. With four Maps and 154 Vertical Sections. By H. M. Chance. - 2. The Geology of Lawrence County. A Report on the Correlation of the Coal-measures in Western Pennsylvania and Eastern

J M J M

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https://doi.org/10.1017/s0016756800148149

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Journal: Geological magazine	Publication Date: Aug 1, 1880
License type: public-domain

#Geological Survey Of Pennsylvania #Leo Lesquereux + Show 8 more

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II.—Second Geological Survey of Pennsylvania - 1. Part I. The Northern Townships of Butler County. Part II. A Special Survey made in 1875, along the Beaver and Shenango Rivers. With four Maps and 154 Vertical Sections. By H. M. Chance. - 2. The Geology of Lawrence County. A Report on the Correlation of the Coal-measures in Western Pennsylvania and Eastern

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