90 



NEW YORK STATE MUSEUM 



The following table shows the succession of formations in this 

 region, of which those above the Hamilton of the Devonic and 

 those below the Lorraine of the Champlainic are not shown in 

 the area covered by the map. 



Carbonic absent from this region. 



Upper -j 



GROUP 



f Chautauquan 



Devonic 



Middle 



[ Lower -{ 



fcenecan 



Erian 

 |^ Ulsterian 

 ^ Oriskanian 



Heldbergian 



Silnric or ( TT „ 



Ontario U PP er Ca ->' u S an 



STAGE 



Catskill 



Oneonta 



[tliaca 

 . Sherburne 

 j Hamilton 

 / Ma reel lus 

 j Onondaga 

 / Schoharie 

 ( Esopus 

 \ Oriskany 

 f Port Ewen 

 j Becraft 

 ] New Scotland 

 I^Coeymans 

 f Man 1 ins 

 | Rondout 

 I Cobleskill 

 j Bray man 

 1 Basal (Binnewater ?) 

 sandstone 



Hiatus and stratigraphic unconformity 



Champlainic 



f Upper Cincinnatian 



i 



i Middle Mohawkian 



Lower Canadian 



Cambric or TT c 



m . i Upper baratosran 

 1 aconic ' 1 1 to 



j Lorraine 

 / Utica 

 ( Trenton 

 ] Black River 

 ( Lowville 

 \ Ckazy 



\ Beekmantown 

 Potsdam 



Hiatus and structural unconformity 



Crystalline Archean and Algonkian 



A I two levels in the table a hiatus occurs which in each case 

 marks an important physical break in the series, and a time 



