470 A. W. GKABAU THE SHERBURNE SANDSTONE 



County Hamilton is seen in the sections west of Kingston (near West 

 Hurley, etcetera), and it is evident that no stratigraphic break exists 

 between the two. The fossiliferons Hamilton beds, therefore, can repre- 

 sent only the lower part of the Hamilton . beds of the sections farther 

 west, while the Ashokan represents its upper portion, which has a non- 

 marine character in the east. The marine beds are well exposed at Mount 

 Marion, west of Saugerties, 'New York, and for them the name of Mount 

 Marion beds is here proposed. The amended Ulster County succession of 



the Devonic is therefore as follows : 



Feet 



Chemung series 



Catskill sandstone and conglomerate 1,725 



Portage series 



Oneonta sandstone and shales 3,000 



Hamilton series 



Ashokan shales and flags 500 



Mt. Marion shales and sandstone 500 



"Marcellus" shales • 300 



Onondaga series 



Onondaga limestone 75-85 



Schoharie-Esopus 300 



Oriskany 5-60 



Port Ewen 0-150 



Hiatus and disconformity 



Alsen ^^ cherty limestones 20-50+ 



Becraft limestone 30-40 



New Scotland 60-100 



Coeymans 30-60 



Base of Devonic (conformity) 



Manlius limestone of the Siluric. 



3» This name is proposed for the cherty limestones which overlie the Becraft and con- 

 tain a modified Becraft fauna. These beds are well shown in the hills above Alsen, at 

 Becraft and Schoharie, and they are everywhere stratigraphically continuous with the 

 Becraft. On Mount Becraft and at Schoharie, where they have heretofore been classed 

 as Port Ewen, they are disconformably succeeded by the Oriskany sandstone. At Alsen 

 the Port Ewen is likewise absent, but at Kingston and on the West Shore Railroad section 

 near Port Ewen station the Port Ewen beds rest disconformably on the Alsen, of which 

 18 feet are shown on the West Shore section, while perhaps 10 feet have been removed, 

 together with the Becraft, in the quarry which interrupts the section. The hiatus be- 

 tween the Alsen and Port Ewen or the Alsen and the Oriskany is marked by nearly 

 2.000 feet of calcareous deposition in the Gaspe region. 



