DAETON.l 



NORTH AMERICA.N GEOLOGY. 



733 



Pennsylvania — Continued. 

 1878. Eozolo rocks of North America, 

 Hunt, T. S. 

 Paleozoic of Lehigh and North- 

 ampton County, Prime. 

 Overturned anticlinals near Al- 



leutown, Prime. 

 Measured section of Paleozoic 

 rocks between Lock Haven and 

 Farrandsville, Clinton County, 

 Chance. 

 Catalogue of rock specimens, 

 I survey of Pennsylvania, Hall, 

 ' C. E. 

 Section, in Lancaster County, 



Frazer. 

 Upper Devonian of southwestern 



Pennsylvania, Stevenson. 

 Silurian fossils in eastern Penn- 

 sylvania, Prime. 

 Terrace levels in Pennsylvania, 



Lesley, J. P. 

 Hematites of Lehigh County, 



Prime. 

 Martic anticlinal, and on ripple 



marks, Frazer. 

 Petroleum and other hydrocar- 

 bons, Broadhead. 

 Report on Indiana County, Piatt, 



W.G.; Lesley, J. P. 

 Surface geology of southeastern 



Pennsylvania, Stevenson. 

 Limits of Catskill and Chemung 



formations, Sherwood, A. 

 Section of Paleozoic rocks in 

 Blair County, Piatt and San- 

 ders. 

 1879. Geology of Lawrence County, 

 White, I. C. ; Lesley, J. P. 

 Northern townships of Butler 

 County, survey along Beaver 

 and Shenango rivers, Chance. 

 Correlation of coal measures of 

 Pennsylvania and Ohio, White, 

 I. C. 

 Serpentine and steatite in Dela- 

 ware County, Rand. 

 Southern limit of last glacial 

 drift across New Jersey, etc., 

 Cook. 

 North American Mesozoio and 



Cenozoic, Miller, S. A. 

 Classification of coals, Lesley, 



J. P. 

 Second report of laboratory of 

 survey of Pennsylvania, Mc- 

 Creath. 



Pennsylvania — Continued . 



1879. Macfarlane's Geological Railroad 



Guide, Lesley, J. P. 



Terminal moraine of North Amer- 

 ican ice sheet, Upham. 



Mesozoic sandstone of the Atlan- 

 tic Slope, Frazer. 



Clays and clay slates of York, 

 Adams, and Lancaster Coun- 

 ties, Frazer. 



Bradford oil district, Ashburuer. 



Notes on analyses of dolomites of 

 Cumberland County, Lesley, 

 J. P. 



Geology of South Mountain, 

 Frazer. 



Origin of clays. Hunt, T. S. 



Lake Superior copper rocks in 

 Pennsylvania, Blandy, Hunt, 

 T. S. 



1880. Drift of Northampton County, 

 Prime. 



Gravels of southeastern Pennsyl- 

 vania, Lesley, J. P. 



Character of Sullivan County 

 coals, Piatt, F. 



Geology of Mercer County, 

 White, I. C. ; Lesley, J. P. 



Coal fields of Potter County, 

 Piatt, F. 



Geology of Potter County, Sher- 

 wood, A. ; Lesley, J. P. 



Lycoming and Sullivan counties, 

 Sherwood and Piatt. 



Characteristics of a trap at Wil- 

 liamsons Point, Frazer. 



Zinc mines, Lancaster County, 

 Spilsbury. 



Reconnaissance from Poulet to 

 Sharon, Ashburner. 



Geology of Lancaster County, 

 Frazer. 



Queens Run coal basin, Piatt, F. 



Geology of oil regions, Carll. 



Hudson fossil In slate in Mary- 

 land, Lesley, J. P. 



Report on Armstrong County, 

 Piatt, W. G. ; Lesley, J. P. 



Geology of Clarion County, 

 Chance. 



Structure of Chicques rock, 

 Frazer. 



Well in Westmoreland County, 

 Lesley, J. P. 



Geologic action of humus acids, 

 Julien, 



