26 CHARLES S. PROSSER 



1898 the writer became Chief of Division of Appalachian Geology 

 of the Maryland Geological Survey, and with Mr. Rowe as his 

 principal assistant devoted that summer to field work on the Paleo- 

 zoic formations of western Maryland. We worked together in 

 the field and were fully agreed concerning the correlation of certain 

 Kmestones with the Coeymans, New Scotland, and Becraft 

 formations of New York, which is beUeved to be the first definite 

 recognition of them in Maryland. A statement of the relationship 

 of this work was published by the writer in 1901,^ together with the 

 correlation of the Helderberg limestone with the New York forma- 

 tions.^ This was recognized by Mr. George W. Stose, who wrote 

 as follows: 



The presence in this region [Pawpaw-Hancock Folio] of a representative 

 of the Helderberg group of New York has long been known, but in earlier 

 reports of the United States Geological Survey and of the Maryland Survey 

 it was not differentiated as a separate formation but was included with the 

 underlying calcareous formations under the name Lewistown. In 1901, 

 Prosser, reporting the results of studies made by him and his associates for the 

 Maryland Geological Survey, later embodied in the State report [Vol. VI 

 (1906), 133, 134], recognized in the Maryland rocks the various faunal divisions 

 of the Helderberg of New York.3 



The writer in his Historical Review and Bibliography of the 

 Maryland Devonian summarized the contents of his 1901 article 

 on "The Paleozoic Formations of Allegany County, Maryland.""? 

 The notice of "The Geology of Allegany County" in the same 

 review contains the statement that "The nomenclature and classi- 

 fication of the formations are those adopted by Messrs. Clark, 

 Prosser, and Rowe for the Maryland formations. "^ 



^ Journal of Geology, IX, (1901) 409. 



2 Ibid., 415, 416. 



3 Geologic Atlas of the United States, Folio No. 179 (1912), p. 9, col. i. 



4 Maryland Geological Survey, Lower Devonian, text (1913), p. 51. 



5 Loc. cit. 



