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: 147
Subjects: Geology -- Pennsylvania.; Geology, Stratigraphic -- Archaean.
Notes: "Part I: historical introduction.

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

Filmed from a copy of the original publication held by the Library, Geological Survey of Canada. Ottawa : Canadian Institute for Historical Microreproductions, 1980.