Final report ordered by Legislature, 1891
Subtitle: A summary description of the geology of Pennsylvania, in three volumes, with a new geological map of the state, a map and list of bituminous mines ...
By: J. P. Lesley, state geologist.
Contributors: Ingham, William Armstrong, 1827-1913.
Publisher: Pub. by the Board of commissioners for the Geological survey
Published: 1892
Place of publication: Harrisburg
Subjects: Geology -- Pennsylvania.; Geology, Stratigraphic -- Paleozoic.; Coal -- Pennsylvania.
Table of contents: title: vol. I. Laurentian, Huronian, Cambrian and Lower Silurian formations, J. P. Lesley.; title: vol. II. Upper Silurian and Devonian formations, by J. P. Lesley.; title: vol. III, pt I. Carboniferous formation, by J. P. Lesley., E. V. d'Invilliers, and the New Red of Bucks and Montgomery counties, by B. S. Lyman.