ANCIENT WATER LEVELS OF CII A M PLAIN-HUDSON VALLEYS 209 



also found at this locality a single example of the gastropod 

 Cylichna alba (?) apparently identical Avith the form 

 now rarely found at Port Kent. The bivalve shells in this 

 sand deposit invariably exhibited signs of transportation in that 

 most of the detached valves were lying outside up in the sand lay^ 

 ers after the manner of shells moved by rather gentle currents. 

 Whether in their original matrix or not, the shells afford good 

 evidence of the marine invasion to this point and to the altitude 

 given. 



Fossils at Norwood N. Y. Fossil shells of Macoma groen- 

 1 a n d i c a are abundant in the clays at Norwood, St Lawrence 

 co., N. Y., particularly in the low ground in the western part of 

 the village. The sewer trenches opened in the summer of 1903 

 brought to light numerous pockets of these shells. I found this 

 shell in clays under sands and lying on boulder clay about 3 feet 

 below the surface near the street crossing the Rome, Watertown & 

 Ogdensburg Railroad south of the Union station, at an elevation 

 of about 335 feet. The same shell appears in the clays from the 

 sewer trench on top of the hill in the northern part of the village 

 at an elevation of 360 feet aneroid or 370 feet according to 

 the engineer's levels compared with Norwood station. I also 

 found Macoma groenlandica in a cutting of the Nor- 

 wood & St Lawrence Railroad just northeast of the junction at 

 Norwood at an elevation by aneroid of 350 feet. These shells 

 were in stony clays, the rubbly marine drift, at the western 

 base of the dune-capped hill which forms a prominent feature on 

 the northeastern outskirts of Norwood. This region includes the 

 highest shell locality yet discovered on the northwest slope of the 

 Adirondacks and is, so far as I have been able to ascertain, the 

 highest yet reported within the State. The locality is nearly 30 

 feet higher than the highest shell layer that I have seen in the 

 Champlain valley but shells are to be expected in the western part 

 of the town of Mooers as high as 400 feet. 



Fossils at Montreal, Canada. The deposit of marine shells at 

 the Cote des Neiges on Mt Royal is said to consist of a bed of 

 gravel 6 feet thick with Saxicava rugosa and Macoma 

 (T e 1 1 i n a) groenlandica. According to Sir Charles . 

 Lyell 1 the deposit is covered by an unstratified mass of boulders 



J Lyell, Sir Charles. Travels in North. America. N. Y. 1845. 2:119. 



