COMPARATIVE CHART OF SECTIONS 179 



base of the Glean conglomerate and its supposed equivalents, in a 

 series of sections extending from Licking county, Ohio, to Monroe 

 county, Pennsylvania. 



Explanations of the Comparative Chart of Sections 



The sections are in order from west to east, namely : 



A. Licking county, Ohio. 



B. Meadville, Crawford county, Pennsylvania, and across Erie county, Pennsyl- 



vania. 



C. Jamestown, Chautauqua county, New York, and Garland, Pennsylvania. 



D. Warren, Warren county, Pennsylvania. 



E. Genesee valley and Olean, New York. 



F. Ithaca and Cayuga lake. New York. 



G. Chenango River valley. New York. 



H. Catawissa, Columbia county, Pennsylvania. 



I. Monroe and Pike counties, along Delaware river, Pennsylvania. 



The measurements and names of formations of the sections are based 

 on official survey reports, and the range of fossils in them has been re- 

 vised chiefly by those whose names are given below : 



Section A. Revised Ohio survey section, Orton, Herrick, and Prosser. 



B. I. C. White, Second Pennsylvania, Q4; revision, E. M. Kindle and 



H. S. Williams. 



C. G. D. Harris and Carll, 14, Second Pennsylvania; range, E. M. Kindle. 



D. Carll, 14, Second Pennsylvania; range, E. M. Kindle and H. S. Wil- 



liams. 



E. H. S. Williams and E. M. Kindle ; section revised by M. L. Fuller (U. S. 



Geological Survey). 



F. H. S. Williams, E. M. Kindle, H. F. Cleland. 



G. C. S. Prosser and H. S. Williams. 



H. I. C. White, Second Pennsylvania, G 7 ; revised paleontology, E. M. 



Kindle. 

 I. L C. White, Second Pennsylvania, G6; revised paleontology, C. S. 

 Prosser. 



The sections are arranged in order along a curved line extending from 

 Licking county, Ohio ; first northeastward toward Jamestown; thence 

 eastward to Ithaca ; thence nearly east to Norwich ; thence southeast- 

 ward to the Delaware Water Gap near Strondsburg. On such a line the 

 sections are placed in approximately the relative distances apart which 

 they occupy in nature, such a line theoretically representing a section 

 at right angles across the successive zones of conditions extending out 

 from a shore which had a general trend parallel to the Atlantic coast, 

 northeast and southwest. The total distance is about 500 miles. 



