01065cam a22002651 4500 gs 07000713 DLC 20260227111306.0 810923s1878 paub 000 0 eng c gs 07000713 (OCoLC)7785810 U.S. Geol. Survey. Library NBuU DLC premarc QE653 .H94 Hunt, Thomas Sterry, 1826-1892. Special report on the trap dykes and Azoic rocks of southeastern Pennsylvania. By T. Sterry Hunt. Part I. Historical introduction. Harrisburg, Pub. by the Board of commissioners for the Second geological survey, 1878. Exxi, E253, 2, [1] p. front. (map) 23 cm. Pennsylvania. Geological survey, 2d. [Report of progress E] At head of title: Second geological survey of Pennsylvania: 1875. No more published. Geology Pennsylvania. Geology, Stratigraphic Archaean. Report of progress (Geological Survey of Pennsylvania), E. 24620 24620