446 NEW YORK STATE MUSEUM 



Sprakers, 25 miles to the west. Nos. 4 and 5 of this section are 

 at some distance from each other but their lithologic and paleon- 

 tologic characters clearly show them to belong to distinct parts of 

 the Trenton substage. The layers of no. 5 are highly inclined but 

 as their parallelism with reference to each other has not been de- 

 stroyed the thickness given for them is fairly exact. 



Northwest of Van Epp's hill the lower Trenton rocks are ex- 

 posed near their junction with the Calciferous in a small quarry 

 north of the highway between Glenville and Crane's village at a 

 point not far west of the Schenectady-Montgomery county line. 

 The layers here are as follows in descending order (2G) : 



G"^ At top very thin layer of granular highly fossiliferous rock 

 adhering closely to next layer below. 



G^ Drab, fine grained limestone with some 

 crystals of calcite. Weathers ash-white. Contains 

 fragments of a trilobite, probably A s a p h u s 

 platycephalus Stokes, and crinoid segments 

 on upper surface. 9''=5' 9" 



G^ Two layers weathering ash-white, of drab 

 color, fine grained. Contain corals (Strepte- 

 1 a s m a) and Gastropoda. i'=5' 



G* Thin lumpy layers of dark color, containing 

 fragments of a trilobite. 8"=4' 



G^ Layer weathering very light gray, smooth 

 fracture^ very fine grain, drab. Contains S t i c - 

 t o p o r a and Rafinesquina alternata 

 (Con.) Hall and Clarke. 6^=3' 4" 



G^ Light colored gray-weathering limestone with 

 smooth fracture. Contains Orthoceras, 

 Stictopora and fragments of a trilobite. i' io''=2' 10" 



G"- Thin bedded, dark blue^ fine grained lime- 

 stone showing occasional crystals of calcite. Ir- 

 regular lumpy structure with slicken-sided masses. 

 Weathers light gray. Contains Stictopora, 

 corals and fragments of trilobite. i'=i' 



This entire section probably belongs to the Black river horizon 

 though the characteristic fossil, Columnaria alveolata, 

 was not found. The limits of the exposure are small. 



