﻿2o Bulletin 19 70 



Manlius is difficult to ascertain, as it is not all exposed at one lo- 

 cality. The figure given (45 ft.) may be taken as only approxi- 

 ately correct. The lower layers are replete with crinoid stems, 

 and Orthis, Strop heodonta, Meristella, Dalmanites , Orthoceras , to- 

 gether with Spirifer vanuxemi are often found in great profusion. 

 A very detailed section of these beds has been made and a large 

 number of fossils collected by Mr. Pacheco, but as yet the labora- 

 tory work and identification has not been completed. Stromato- 

 pora is abundant in layers and in weathering it gives a peculiarly 

 rough and "corniferous" aspect to the rocks. 



A little quarry has been opened up recently on the east side of 

 the road in the gray cement rock. The floor of the quarry 

 shows the top layers of the fossiliferous limestone. These gray 

 rocks may be traced across the road to the large quarries west of 

 the same, and there they form the lowest layers quarried. They 

 show in the accompanying plate (PI. 7) at the base of the ex- 

 posure. 



The layers which follow with a thickness of 12 ft. are of a 

 dark, fragmental appearance, and notwithstanding the conchoidal 

 fracture and apparent cherty character, they contain in places a 

 goodly number of bivalves and gasteropods. They extend up to 

 the hat shown in the plate just referred to. 



Though, as Williams says, Gypidula galeata may be most 

 abundant in a ift. layer, it really occurs through 15 ft. of typical 

 Coeymans limestone. What follows these exposures at the quar- 

 ries seems difficult to determine since in the pasture above (Mr. 

 Allen's) the are few outcrops. 



At the base of the Oriskany sandstone, layers are found replete 

 with a Meristella apparently Icevis of Hall, though Williams calls 

 it M. arcuata and speaks, at least in one place, of Hall's corrobo- 

 ration of his identifications. 



Further details regarding this section will doubtless appear in 

 this publication a year hence. 



By comparing this section with the one discussed before "IV 

 Perry ville' ' one notices a marked change in the thickening of the 

 Helderherg beds, and a great increase in the number of fossils 

 from the upper Manlius. Farther east the Helderberg beds still 

 increase in thickness, and the Manlius retain their extreme fos- 

 siliferous character. 



