Special report on the trap dykes and azoic rocks of southeastern Pennsylvania
By: by T. Sterry Hunt.
Series: CIHM/ICMH microfiche series -- no. 07762.
Publisher: Board of Commissioners for the Second Geological Survey
Published: 1980
Place of publication: Harrisburg [Pa.]
Language: eng
Format: Microform
Number of pages: 253
Subjects: Geology -- Pennsylvania.; Geology, Stratigraphic -- Archaean.
Notes: "Part I: historical introduction."

At head of title: Second Geological Survey of Pennsylvania, 1875."

Reproduction of original in: Library, Geological Survey of Canada.

Pre-1900 Canadiana.

Microfiche. Ottawa : Canadian Institute for Historical Microreproductions, 1980. 3 microfiches (147 fr.) ; 11 x 15 cm. (CIHM/ICMH Microfiche series = CIHM/ICMH collection de microfiches ; no. 07762).