THE PALEOZOIC FORMATIONS OF ALLEGANY 

 COUNTY, MARYLAND^ 



INTRODUCTION 



The author of this paper has been engaged since the summer 

 of 1897 £^s chief of the Division of Appalachian Geology of 

 the Maryland Geological Survey in studying the geological for- 

 mations of the western counties of Maryland. He has had as 

 assistants in this work at different times Messrs. C. C. O'Harra, 

 R. B. Rowe, G. C. Martin, A. C. McLaughlin, and A. P. Romine. 

 Mr. Richard B. Rowe, who was already acquainted with the New 

 York formations, reached the conclusion, as the result of his 

 field work during 1897, that several of the Paleozoic forma- 

 tions of western Maryland could be correlated with those of 

 New York. The continuation of Mr. Rowe's work, together 

 with that of Mr. Romine, under my direction during the 

 field seasons of 1898, 1899, and 1900 further confirmed these 

 views. 



The following account of the Paleozoic formations of Allegany 

 county, Maryland, embraces a brief description of their charac- 

 ter and distribution, together with a statement regarding their 

 probable correlation with the New York and Pennsylvania for- 

 mations. The report of Dr. C. C. O'Harra on "The Geology of 

 Allegany County"^ incorporated the revised classification of 

 western Maryland devised by Dr. William B. Clark, the writer, 

 and his assistants, and thus represents the conclusions, based on 

 the field work carried on during the seasons of 1 897-1 900. The 

 writer is under obligations to Professor Bailey Willis, whose 

 manuscript on "The Appalachian Region — Paleozoic Appa- 

 lachia, or the History of Maryland during Paleozoic Time,"^ was 



' Published by permission of Dr. William Bullock Clark, state geologist of Mary- 

 land. 



^Md. Geol. Survey, Allegany county, 1900, pp. 57-163. 



3 Maryland Geol. Survey, Vol. IV, 1900, pp. 23-93. 



409 



