1897.] NEW YORK ACADEMY OF SCIENCES. 103 



suits. To describe the peculiarities of its lamiuation is impos- 

 sible ; faults, synclinals, anticlinals and every other familiar type 

 of structure occur, sometimes within the space of a few ^^ards ; 

 the dip of the laminje varies from to beyond the vertical, but 

 no foldings, such as result from pressure, were observed. Al- 

 though the grain is usually very fine, yet the rock sometimes 

 has sand as coarse as that seen on the Tuckertown dune. One 

 quarry in Hamilton occasionally yields blocks with shell frag- 

 ments fully one-third of an inch square. 



The sandstone was not deposited continuously to its final 

 thickness in any locality, but now here and then there, as is the 

 case with the present dunes, and clay beds marking the halts are 

 seen at various horizons. Such a bed, nearly one foot thick, is 

 shown in the road near St. George ; one, in the approach to the 

 old Devonshire fort, slopes seaward like the plant-covered sur- 

 face of the Tuckertown dune ; that on Burnaby street in Hamil- 

 ton, two to five inches thick, is said to have yielded not merely 

 vegetable remains, but also some eggs of birds ; another of less 

 extent was seen on another street in Hamilton. 



Odd non-conformabilities were seen within the mass at many 

 places; a long tborongh cut on Cedar Avenue in Hamilton 

 shows a distinct line of separation between a lower horizontally 

 laminated and an upper irregularly laminated deposit ; no clay 

 marks the place, but this may well be an old surface of hardened 

 rock not exposed long enough to yield the residual soil or else 

 washed clean of soil before the new deposit was made. It is 

 possible that the contact between horizontally laminated and 

 Irregularly laminated rock observed on two islands near the 

 Great sound may be explained in the same way, though the ex- 

 planation may be sought elsewhere. 



The Intermediate Deposit, 



Good exposures at several localities around Harrington sound 

 and Castle harbor show between the sandstone and the lime- 

 stone a conglomerate varying in thickness and distribution but 

 distinctly marking an eroded surface of the limestone, which, in 

 many places, had been covered with thick soil. It is probably 

 continuous with fragmentary deposits observed along the south 

 shore, but no proof can be obtained as the Tuckertown dune in- 

 tervenes. This deposit covers irregular surfaces of the lime- 

 stone just as the soil now covers the underlying rock. 



The old government quarry* on the north side of Stocks 

 point, half a mile from St. George, shows the following succes- 

 sion : Sandstone, Conglomerate, Limestone. 



♦This locality has been referred to by Prof. Rice, see U. S. Nat. Mus. Bull , No. 25., p. 



