NOMENCLATURE OF THE OHIO FORMATIONS 529 



termed the " Sharon conglomerate," which is a conspicuous lith- 

 ologic division. At present we are not prepared to propose a 

 classification for the remaining part of the formation. 



10. In the later reports of the Ohio Survey this division is 

 usually called the "Sharon conglomerate." Professor Lesley 

 used the name " Sharon conglomerate (Ohio conglomerate) " in the 

 list of geological divisions for Lawrence county, Pa.,^ and on 

 p. xxxiv he states that the Sharon conglomerate " is undoubt- 

 edly part (or the whole) of the Ohio conglomerated Also on 

 p. 296 is a brief description by Dr. L C. White of the Sharon 

 conglomerate as exposed near the town of that name. Of the 

 two names used by Professor Lesley, " Ohio " was preoccupied, 

 since Andrews used it in 1870 for the Ohio shale ; and it is a 

 question whether Sharon was available, since Professor H. D. 

 Rogers in 1858 proposed the name "Sharon group " for the 

 Sharon coal and associated rocks overlying this conglomerate, 

 but apparently ;2^/ including it,^ and in 1877 Professor Stevenson 

 followed Rogers in describing the Sharon coal group of western 

 Pennsylvania. 3 



The " Olean conglomerate " was formally named and described 

 by Ashburner in 1880 in his description of the geology of 

 McKean county. '^ The above statement is corroborated by 

 Professor Lesley, for he has stated that " The Olean conglom- 

 erate received its name during the survey of McKean county 

 from the magnificent fragment of it at the rock city north of the 

 state line, west of the town of Olean [N. Y.]."^ The above, 

 however, was not the first usage of the name "Olean" for this 

 conglomerate, for Professor Lesley himself in 1875 used the 

 term " Olean conglomerate (Garland) " in referring to this for- 

 mation in northwestern Pennsylvania.^ Later in the same report 

 Mr. Carll used the name " Garland conglomerate " for the rocks 



^Second Geol. Surv. Pa., Q ^ 1879 (?), Preface, p. xxix. 



== Geol. of Pa., Vol. II, p. 489. ^Second Geol. Surv. Pa., K% p. 103. 



* Ibid., p. 56; and see "General Vertical Section of the Rocks of McKean 

 County," on p. 43. 



^ Ibid., "A Summary Description of the Geology of Pennsylvania," Vol. Ill, 

 Part I, 1895, p. 1873. 



^ Ibid., I, p. 38, footnote. 



