i7i the State of New York. 201 



the following details of a very accurate section, to the depth of 

 seven hundred feet, of the strata at the Salt Works of Kis- 

 keminitas in Pensylvania. 

 Feet. Diluvium. 



20. Sandstone. 

 3. Coal. 

 3. Limestone. 

 120. Sandstone. 

 4: to 5. Coal. 



3. Limestone. 

 S8. Sandstone. 



2. Coal. 

 50. Sandstone. 

 5 to 6. Coal. 



100. Carboniferous limestone. 



300. Saliferous rock resting upon transition limestone. 

 In this saliferous rock thirty-six wells have been sunk at 

 these works and in the vicinity for brine. — That this order of 

 succession is not peculiar to Kiskeminitas will appear from 

 the following passage: " In many parts of the western coun- 

 try boring for salt water is frequently continued some hun- 

 dreds of feet (sometimes as much as four hundred feet) below 

 the surface, through calcareous and sandstone rocks, and oc- 

 casionally through beds of coal^'P 



The writer of this paper is by no means so anxious to vin- 

 dicate Mr. Featherstonhaugh's opinions, as to give a proper 

 influence to facts. In Mr. F.'s table of North American rocks, 

 the three great calcareous formations, primitive limestone, 

 transition limestone, and carboniferous limestone, are in their 

 proper places in the general series, and with their becoming 

 associations. The old red sandstone is found supporting the 

 carboniferous series, and the coal-measures being the termi- 

 nating ibrmation of the series, (which the Synopsis admits f,) 

 put the seal of more than probability (in the writer's opinion) 

 to the correctness of Mr. Featherstonhaugh's observations. 



New York, Nortii America, G. W. F. 



Nov. 7, 1H29. 



• Journal of Travels into the Arkansas Territory, p. Z\.—NuUal. 



t As to the basalt of the Synopsis, which overlies the 3rd grauwacke, 

 that is a pure jjiece of fuucv : il hnn never yd been found in Noiili America 

 uvrr/t/iiig thai pari uf the scries hi/ any one. And as to the rest of the upper 

 beds of the Synopsis, with the exception of the calcareous clay made by 

 Mr. v., they are nothing but ordinary diluvial and alluvial matter. 



N. S. Vol. 7. No. 39. March 1830. 2 D XXXI. Notes 



