92 The Ohio Naturalist. [Vol. X, No. 5, 



C)0 feet above Coal No. 3 another coal, another limestone, and 

 another ore bed are found. ****** Where the interval between 

 the limestones is considerable, two and sometimes three coal 

 seams are found between them." (Ohio Geol. Sur. Vol. II, 

 p. 139.] 



The writer questions the interval of 20 feet between the Lower 

 or Blue Limestone (which is probably the Lower Mercer) and 

 the Putnam Hill. There are other limestones between these two 

 which Newberry so far has not reckoned with and it seems 

 ■quite probable that where an interval of much less than 90 feet 

 '■occurs another stratum is met. 



In his report on Stark County [Ohio Geol. Sur. \'ol. Ill, pp. 

 151-176] Newberry nowhere mentions the presence of more 

 than two limestones below the Lower Kittanning Coal. He 

 regularly regards the upper one of the two given as the Putnam 

 Hill, and the lower one, the Lower or Blue Limestone. There is 

 evidently mistaken identification as will appear later in the 

 detail study to follow. 



One county remains to be considered which will complete a 

 belt of territory extending from Muskingum Coiinty, Ohio, to 

 southwestern Mercer County, Pennsylvania, in which belt the 

 lower group of limestones occurs. The last link is Mahoning 

 County. In his report on this county Newberry notes the pres- 

 'Cnce of four limestones below the Lower Kittanning Coal as 

 indicated in the "Section at Lowell" [Ohio Geol. Sur. Vol. Ill, 

 ■opposite p. 804.] Near Youngstown three limestones are indi- 

 cated as present [Ohio Geol. Sur. Vol. Ill, p. 803]. The upper one of 

 these is certainly a new stratum and not in the ' ' Section at Lowell ' ' 

 .as will be shown later. On Indian Creek in Canfield Township 

 lie notes the presence of two limestones and designates the asso- 

 ciated coals as "No. 3 and 3a," which would indicate that he 

 regarded the lower limestone as the Lower or Blue Limestone. 

 This identification will be considered later. 



In his report on Coshocton County, Read notes a limestone 

 between the "Blue" or "Zoar," and the "Gray" or "Putnam 

 Hill," and near the former. [Ohio Geol. Sur. Vol. Ill, p. 567.] 

 Andrews appears to have observed another limestone near the 

 Zoar or Lower Mercer in northern Muskingum County. He also 

 notes a thin limestone above the Putnam Hill at Zanesville. 

 [Ohio Geol. Sur. Vol. Ill, p. 823.] Orton also notes a limestone 

 30 to 40 feet above the Zoar in Vinton and Hocking counties, 

 which he names the " Gore Limestone" in 1878, apparently from 

 a village in north-eastern Hocking County. [Ohio Geol. Sur. 

 Vol. Ill, p. 898.] Thus in 1878 a limestone occuring between the 

 Lower Mercer and the Putnam Hill was recognized in rather 

 widely separated places. 



