550 NEW YORK STATE MUSEUM "* 



EXTENSION OF ZONE OF NOEMANS KILL BEDS 



{Loiver Dicellograptus beds) 



That the Dicellograptus beds extend farther south along the 

 Hudson river is fully demonstrated by the collection made by 

 Ford at Schodack Landing and by the rich collecting grounds of 

 graptolites near Stockport on the Kinderhook creek and at Mt 

 Moreno, near Hudson. An occurrence worthy of record is the 

 alternation of indurated green slate containing fucoids, with 

 black, graptolite-bearing shales, in a quarry at the north side of 

 Mt Moreno where the alternating bands often do not exceed an 

 inch in thickness. 



The presence of the Normans kill fauna at the Poesten kill near 

 Troy, at Rensselaer, the Moordener kill, Schodack Landing, the 

 Kinderhook creek and Hudson, all east of the Hudson river, and 

 at the Normans kill (Kenwood) and the Abbey (Glenmont), west 

 of the river, demonstrates the presence of a zone of Normans 

 kill or Dicellograptus beds to the east of the other zones, as a 

 glance at the map will show. This zone may extend northward 

 through Vermont into Canada. It has also been found in Maine 

 (39). 



TAXONOMIC POSITION OF THE NOEMANS KILL GEAP- 



TOLITE BEDS 



In the region northeast, east and southeast of Albany the 

 Normans kill zone is cut off by the overthrust fault which 

 brought it in contact with the Cambric beds. Farther south it 

 has been found to rest on lower Trenton limestone (33). These 

 Trenton limestone beds, which are in the north only indicated by 

 the conglomerate beds of Eysedorph hill, the Moordener kill and 

 Schodack Landing, would, hence, constitute a fifth zone. Be- 

 tween this zone and the zone of middle Trenton shales and lime- 

 stones, outcropping at Watervliet and south Troy, is now inter- 

 posed the Dicellograptus zone. There can, hence, in the mass of 

 ^^Hudson river shales" be discerned four zones from west to east, 

 namely: 



