194 



NEW YORK STATE MUSEUM 



Lower Oriskany — Upper A i, Lower A 2, Upper B 2, Upper 

 D 14, Lower D 15, Upper F 10, F 11, K 22, K 23, K 24, K 25, K 26, 

 K 27, K 28, Lower K 29, Upper L 8, L 9, Lower L 10 



Lower Oriskany (Trilobite bed) — Top of B 2, Top of D 14, 

 F 1 1 , K 27 



Upper Oriskany — Upper A 2, A 3, A 4, A 5, A 6, Upper D 15,. 

 F 12, Upper K 29, K 30 , K 31, K 32 , K 33, K 34, K 35, K 36, K 37,, 

 K 38, K 39, K 40, K 41, Upper L 10, L 11, L 12, L 13, Lower L 14 



Esopus — K 41, Upper L 14, L 15 



Onondaga — K 42, K 43, K 44, K 45, K 46, K 47, K 48, K 49, 

 K50, K 51 



COMPARISON WITH SIMILAR HORIZONS IN OTHER REGIONS 



Trilobite Nearpass 

 Becraft mt Rondout mt quarries W. Md. and 



e. N. Y. e. N. Y. s. e. N. Y. n. w. N. J. n. e. W. Va. 



300± ft 



300-325 



550± 



375 



Land cond. 



Esopus 1 



i-several 



20-70 



i8o± 



170 



348 



Oriskany 



25 



110-200 



200 ± 



80 



Not recog. 



Port Ewen 



40-45 



40 



16 



20 



85 



Becraft 



68 



I00± 



i7o± 



160 



64 



New Scotland j 



45 



50 



40 



40 



no 



Coeymans 



55 



45 



4i± 



35 



no (6) 



Manlius 



240 



365-50S 



647 



505 



717 



Manlius-Oriskany in- 

 , elusive 



A short description of each section follows. I 



1 Grabati. Stratigraphy of Becraft Mountain, Columbia Co., 

 N. Y. N. Y. State Paleontol. An. Rep't 1902. p. 1030-79. 



2 van Ingen & Clark, P. E. Disturbed Fossiliferous Rocks in 

 the Vicinity of Rondout N. Y. N. Y. State Paleontol. An. Rep't 

 1902. p. 1 176-1227. I 



3 The present paper. \ 



4 Weller. Rep. on Pal. Geol. Sur. of N. J. 3 : 56-102. 



5 Schuchert. On the Lower Devonic and Ontario Formations of 

 Maryland. U. S. Nat. Mus. Proc. 26: 413-24. .h 



6 This includes all of the strata from the Salina to the Coeymans. 



I At Becraft mountain, Columbia county, N. Y., Grabau gives the 

 following lithic and faunal characters for these formations.^ In 



^Stratigraphy of Becraft Mountain, Columbia County, N. Y. N. Y. State 

 Paleontol. An. Rep't. 1902. p. 1030-79. 



