230 NEW YORK STATE MUSEUM 



fied was Coelospira acutiplicata (Conrad) . It was 

 found in very large numbers but all were more or less distorted from 

 the very great development of cleavage. Onondaga 29 feet 



K44 On the northwestern side of the Erie tracks at this section 

 is an excellent exposure of very dark gray, calcareous shale, 

 weathering light gray. It is very fossiliferous, many of the fossils 

 being pyritized, specially the gastropods. This cleaves into much 

 larger and broader pieces than in the two preceding localities. The 

 cleavage here as in all the Esopus strata is so perfect and continuous 

 that it closely resembles bedding. At this locality the bedding is 

 seen in the dark colored ribbons about 6 inches in width passing 

 across the cleavage surface. In this respect it closely resembles the 

 Pennsylvania roofing slate except that the latter has, as a rule, 

 narrower ribbons. Onondaga 18 feet 



The following fossils were identified: 



Zaphrentis? r 

 27 Chonetes hemisphericus ? Hall r 

 29 C. yandellanus Hall R 

 32 Coelospira acutiplicata (Con- 

 rad) C 



35 C. grabaui Shimer C 

 40 Dalmanella subcarinata? Hall c 

 42 Eatonia medialis {Vanuxem) r 

 116 Loxonema sp. c 



K45 These strata are very shaly, breaking into broad, thin plates. 

 Slickensides were developed along the cleavage in places. At the 

 top of the hill the strata become more calcareous ; thin beds of 

 impure limestone occur at intervals. Several specimens of 

 Atrypa reticularis (Linn.) were found. Onondaga 100 feet 



K46 Concealed strata. ^ Onondaga 12 feet 



K47 The strata concealed by the old public road leading to the 

 residence of Mr H[enry Hoffman, are found further southward. 

 The cleavage gradually becomes coarser, more platy and with the 

 dark gray, shaly limestone occur intermittent beds of a dense, blue 

 limestone which is at times quite fossiliferous but is usually ap- 

 parently destitute of fossils. Onondaga 20 feet 



23 Atrypa reticularis {Linn.) C 

 27 Chonetes hemisphericus Hall c 

 32 Coelospira acutiplicata (Con- 

 rad) R 

 47 Leptaena rhomboidalis (Wilck- 

 ens) r 



55 Meristella sp. R 

 67 Reticularia fimbriata (Conrad) r 

 84 Spirifer macrus Hall c 

 133 Dalmanites cf. anchiops 

 (Green) R 

 Phacops rana (Green) r 



