Portage Stages of New York. 



221 



On the upper part of Pleasant brook between five and six 

 miles from Smyrna village is an exposure of Tully limestone 

 which is probably the one mentioned by Yanuxem.* The 

 exposure is by the side of the brook, just above the highway 

 bridge, where 26 inches of limestone are exposed with a blue 

 argillaceous shale below, which contains plenty of fossils. The 

 following species were obtained from this shale : — 



1. Spirifera mueronata (Con.) Bill.. (a) \ 5. 



2. Vitulina pustulosa Hall (a) j 6. 



3. Tropidolejrtus carinatus (Con.) Hall 1. 



----- -- -(r) 



4. Modiella pygmcea (Con.) Hall... (rr) 8. 



Nuexdites oblongatus Con. _ (rr) 



Orthonota undulata Con. (rr) 



Pcdceoneilo emarginata (Con.) Hall 



(rr) 



Dalmanites Boothi (Green) Hall, (r) 



About one-half mile farther up the brook is an exposure of 

 black, argillaceous, fissile shale, fifteen feet in thickness, in 

 which an excavation has been made in search of coal. No fos- 

 sils were found in the black shales, which are succeeded by 

 rather thin sandstones. 



There is a moderately steep hill w T est of Smyrna village and 

 Pleasant brook, which is mostly covered above the gorge, 

 though there are occasional exposures. In the highway near 

 the top of the hill, in a small run, are smooth blue shales 

 which are non-fossiliferous. In the field near the summit of 

 the hill, about one mile west of Smyrna and from 475'-500 / 

 above the R. P., is a small excavation that was made in search- 

 ing for flagging stones. The rock is a coarse arenaceous shale, 

 not as blue as the lower exposure, and contains *a few fossils. 



The following species were obtained : 



Spirifera mesacostalis Hall (c) 



Spirifera fimbriata (Con.) BiU.(?) (r) 



Cyrtina hamiltonensis Hall (c) 



Leiorhynchus mesocostalis Hall (c) 

 Productella cf. speciosa Hall (r) 



6. Atrypa reticularis (Lin.) Dalraan (rr) 



7. Chonetes setigera Hall (rr) 



8. Amboccelia umbonata (Con.) Hall 



(r) 



9. Phacops rana (Green) Hall (rr) 



Below Upperville a small run, on the western side of Pleas- 



ant brook, 



a section from the fossiliferous Hamilton 



shales up through the Tully limestone and Genesee black 

 shales into the overlying barren Portage. The shales in the 

 lower part of the run contain specimens of 



*See Geol. X. Y.. Pt. Ill, 1842, p. 164, where Vanuxem says under "locali- 

 ties where observed. — The first point going west is on the turnpike from Sher- 

 burne to DeRuyter, about eight miles from the former village." Also under the 

 geological description of Chenango county it is stated:— "The Tully limestone 

 was seen but in one locality at the north western part of Smyrna, on the road to 

 DeRuyter village where the road crosses the west branch of the Chenango," ibid., 

 p. 292. This outcrop was considered by Prof. S. G. Williams as the one described 

 by Vanuxem (Sixth An. Rep. State Geologist [N. Y.], 1886, p. 18). 



