GEOLOGY AND PALEONTOLOGY OP THE SCHOHARIE VALLEY 259 



Feet 



h Massive Coeymans limestone, the lower ledge 

 22| feet thick; then a covered slope Avith a 



shattered ledge at the top 53-119 



d to g Covered from the level of the Cobleskill to the 

 base of the lowest massive limestone, which is 

 apparently about at the junction of the Man- 

 lius and Coeymans 60-66 



10 Section of strata at the quarries of the Helderberg Cement Co. 



near Howes Cave 



Plates 4. 7, 8 and 20 

 15 Coeymans Feet Inches 



Manlius 



14 Thin bedded lime mudrocks 12 



13 Massive dark gray lime mudrock " upper curly bed "3 8 

 12 Thin and irregularly bedded lime mudrocks like 



bed 8 5 10 



11 Massive dark gray lime mudrocks in a single bed. 



This is known as the lower curly. It does not 

 split on the bedding plane but has a conchoidal 

 fracture. It varies in thickness from 3J feet in 

 one part of the quarry to nearly 5 feet in another. 

 In some portions it is arenaceous in texture. 



Average 4 



10 Dark lime mudrocks in beds from 1 inch to a foot, 

 irregularly bedded, sometimes rather shaly, to 



quarry floor 10 



9 Thin bedded ribbon lime mudrocks 7 3 



Total Manlius 42 9 



Rondout 



8 Shaly, highly argillaceous lime mudrocks 10 



7 Massive bluish lime mudrocks 4 



6 Shaly argillaceous Lime mudrocks to railroad track 



(main line) 6 



5 Concealed, about 12 



