REPORT OF THE STATE PALEONTOLOGIST 1902 



1183 



Detailed section of the formations exposed in the Spring and Delaware 



avenue quarries 



(Stations 301 and 325) 



Helderbergian Coeymans 50', T 



Cayugan. 



25 Shaly limestone 4 , ,0 // 



24 Shaly limestone ll / ,6 ,/ 



.23 Cherty limestone 12',1" 



22 Cherty limestone ll',0" 



21 Hard limestone 7',0* 



20 Basal, marly, transition.. . . 4 / ,10 // 



19 Hard dove, massive 6',4 /7 



18 Light gray compact 6',3" 



17 Stromatopora, upper bed. . 7', 6" 



Manlius 42' 16 Stromatopora, bottom 5', 5" 



15 Dark blue with gray seams. 5',8" 



14 Dark blue 3', 10* 



13 Thin banded 2 ',5" 



12 Gray band 4',6" 



1 1 Paving block or mud crack . 3', 3" 



10 Prismatic or five point 4',4" 



Rondout 19',6" 9 Leperditia bed 2 / ,l // 



8 Curly, variable 8"-19" 



7 Soft gray cement 3', 3" 



6 Hard grav cement 5',0" 



Cobleskill 5a Middle ledge. 



Salina 9', 7"-ll',2" 



Hard black cement. 

 Soft black cement. . 

 Foot] edge 



. 4',8" 

 . 4',5" 

 6"-2',0" 



I Wilbur 5'-7' 2 "Coralline" 5'-7',0< 



Unconformitv 



Upper Champlainic . . Mohawkian 1 Normanskill sandstone . . . 1000' + 



The Champlainic sandstones and the Wilbur limestone are 

 not well shown in this section. 



Salina 



Comprising the dark cements 



3 The " footledge," of hard, fine grained, almost black lime- 

 stone, varies from 6 to 24 inches in thickness. The upper 6 or 8 

 inches are of exceptionally fine grain and are used for cement. 

 The lower portion is rough and fossiliferous containing crinoid 

 fragments and Tentaculites which are best seen when the stone 

 happens to have gone through the kilns. 



4 Soft black cement. A solid bed, 4 feet 5 inches thick, of 

 dark limestone of finer grain than 3, and with some fossils in 

 middle portion. 



