234 Geological Reports of the State of New York. 



long been known that the ooHte of Saratoga County could not 

 belong to the oolitic series of Europe. 



Fourth : Eleven species of organic remains are given to iden- 

 tify the lower cretaceous series of New Jersey, Delaware, and 

 the Atlantic states further south, with that of Europe, p. 45. Mr. 

 Conrad discovered the middle division of this series at Wilming- 

 ton, N. C. The upper division is stated to exist in South Caro- 

 lina and Georgia, and to abound " in the southern counties of 

 Alabama and in Florida." p. 45. 



Fifth : The " lower tertiary" was first noticed by Mr. Conrad, 

 and shown to be the same with the "Eocene formation." "In 

 Georgia, and more rarely, in Alabama, a portion of the formation 

 assumes the character of burr stone," containing beautiful shells 

 finely "silicified," which we admired years ago, and were com- 

 pelled to separate the rock from the Paris burr-stone, which is des- 

 titute of shells. On the Potomac, at Fort Washington, is the 

 same lower tertiary, and at Claiborne, Alabama, Mr. C. found in 

 it "about two hundred species of shells and corallines, many of 

 which are identical with the Eocene species of Europe." p. 46. 



Sixth : The rocks of the older Silurian system, terminating 

 upwards with the Peiitamerus ohlongiis limestone in this report, 

 seem to be bounded on the south by the Mohawk River and the 

 Erie Canal nearly, and which are covered by the mountain ridge 

 at Lockport and Niagara River, &c., reappear "at Bedford 

 Springs, and in the vicinity of Cincinnati, Ohio," according to 

 the discovered fossils, p. 32. Indeed, the organic remains at the 

 west seem likely to identify more of the rocks. What an uplift- 

 ing of the strata in Ohio, must have taken place, or a mighty 

 wearing away of the incumbent series which extend westward 

 under the waters of Lake Erie, or a cutting off of the Silurian 

 of this State from that of Ohio by the ridge through which the 

 Niagara River passes. 



In conclusion, reference might be made to the unnamed fucoids 

 of the Niagara sandstone, which are abundant below the lower 

 falls of Genessee, and the numerous shells and fucoids above this 

 sandstone, which remain to be identified or to increase the num- 

 ber of the species. Standing as we do on these remains, the 

 coming and final report is expected to reveal a world of mysteries 

 and settle a host of difficulties. 



