REPORT OF THE STATE PALEONTOLOGIST 1902 1039 

 3 MANLIUS LIMESTONE 



The best place for the examination of the Manlius limestone 

 of Becraft mountain is along the northern margin of the moun- 

 tain, in the city quarry, and at the Hudson aqueduct. At the 

 latter place, just west of the old tavern in Greenport, the entire 

 thickness is shown. At this point a powerful spring issues 

 from the mountains, the water of which supplies the pumps in 

 the city of Hudson. In the bed of the stream formed by this 

 spring the " Hudson river " slates are exposed. They are much 

 contorted and cleaved, the cleavage planes standing vertical. 

 'The direction of bedding could not be determined. Kesting on 

 this are the lower Manlius beds, with a dip of 35° to 40° south- 

 ward, the strike being n. 70° e. A little higher up the dip flat- 

 tens to 20°, which is normal for the rock at this point. The 

 measurements at this point are as follows [see fig. 3] : 



Feet 



From basal contact to base of vertical cliff, the interval 



being a slope with the rock more or less concealed 18 



Hight of cliff portion 34 feet, which, with dip of 20° gives 

 for the thickness of the beds 32 



Thickness of beds forming upper slope from edge of cliff 



to contact with overlying Coeymans 5 



Total thickness of Manlius 55 



No fossils were found at this place. 



At the city quarry in the cemetery off the Newman road 

 (middle longitudinal mountain road) a total of 28 feet of the 

 Upper Manlius is exposed, only 18 feet of which however are 

 shown in the northeastern end of the quarry wall. It is over- 

 lain by 32 feet of Coeymans limestone. (Fig. 4) 



The limestone in this as in the other exposures is a compact 

 finely stratified lime-mud rock, a type of deposit for which the 

 name calcilutite has recently been proposed. 1 Leperditia 

 a 1 1 a is fairly abundant in certain layers in the upper part 

 of the series, and is the only fossil fouDd in these beds outside 

 of the Stromatopora layers noted below. The dip of the strata 

 is 12° s.e., the strike is n. 40° e. 



1 Science, n. ser. Feb. 20, 1903. p. 297. 



