282 



NEW YORK STATE MUSEUM 



Feet Total 



Coeymans. At the top of the High Point cliff there 

 are 27 feet of Pentanierus [Coeymans] limestone, 

 and a little to the south 10 feet more is shown. 

 This limestone forms the top of the terrace, which 

 extends nearly one mile to the south of the cliff 

 before the shaly limestone [New Scotland] is 

 reached, but, on account of the heavy dip, it is not 

 possible to give its entire thickness 37-722 



Manlius. The lower part of the cliff is composed 

 mainly of thin bedded, dark blue limestones, having 

 the metallic ring of those composing the Tentacu- 

 lite [Manlius] formation, and in the lower part are 

 abundant specimens of Tentaculite s g y r a- 

 c an thus (Eaton) Hall. By the side of the 

 High Point path there is 38 feet of this rather 

 thin bedded limestone, in all of which S p i ri f er 

 vanuxemi Hall is common, even to the top. 

 The Tentaculites was not found in these upper 

 layers. At this horizon there is a lithologic 

 change; the upper beds are more massive, breaking 

 with an irregular fracture, and P e n t a m e r u s 

 [S i e b e r e 11 a] g a 1 e a t u s (Dal.) Hall occurs 

 near their base, so that the line of division between 

 the Tentaculite [Manlius] and Pentamerus [Coey- 

 mans] limestones was considered to be represented 

 here 3S-685 



The fossils found in this were: 



1 Tentaculites gyracanthus diatom Hall aa 



2 Spirifer vanuxemi Hall a 



\\ Leperditia alta (Con.) Hall v 



4 Mddiolopsis dubia Hall rr 



5 (?) Tellinomya nucleiformis //</// rr 



<; Stropheodonta varistriata (Con.) Hall r 

 7 Chaetetes (Monotrypella) arbusculus Hall e 



Rondout. In places at the base of the cliff 1 to V/ 2 

 feet of dark gray, impure, thin bedded limestone is 

 exposed, which resembles the upper layers of the 

 waterlime a! Schoharie and Howes Cave, to which 



formation it is referred 1-047 



S trai if/ raphic unconformity 



Lorraine beds. To (he south of Altamont is a con- 

 spicuous point of the llelderbergs known as High 

 Point, where (he general trend of the escarpment 

 turns from a northwesterly to a westerly direction. 

 The lower 646 feet of the point, according to the 



