Geology of Long Island. 351 



The bed of diatomaceous earth is of undetermined extent, and 

 appears to be replaced a little to the east by a bine clay, which 

 however contains some diatoms. It is undoubtedly equivalent 

 to the bed of ochre which overlies the sand throughout the re- 

 mainder of the section. At Jones's brick-yard, adjoining Cross- 

 man's, there is a similar fold nearly at right angles to the first, 

 but the upper portion has been removed by ice or water down to 

 the sand. This stratum, which is yellow and brown in the north 

 part of Crossman's yard, is dark red in the south end and at 

 Jones's. It appears to be mixed with a fine red clayey matter 

 which separates on washing. 



The formation on Lloyd's Neck is similar to that at Cross- 

 man's, with regard to the composition of the strata. On the 

 north side of East Neck, at Eckerson's brick-yard, is a deposit 

 of reddish clay underlain by brown clay very similar to that at 

 Crossman's. To the west of this is a bank of white quartz gravel, 

 while on the east is an extensive deposit of fine white quartz 

 sand, laminated with red, yellow and brown waved streaks. 

 The exact relations of these strata I was unable to determine, 

 but from their analogies to other deposits I am inclined to con- 

 sider the laminated sand as the more recent, 



On the north end of Little Neck there is another large deposit 

 of these laminated sands. At this point they dip S.E. about 

 15°. The following section given in Mather's Report Geol. of 

 1st Dist., p. 254, is more complete than any I could obtain at 

 the time of my visit : 



1. Loose surface sand, 1J ft. 



2. Dark colored loamy sand and clay, - - - 3 " 



3. Yellowish and reddish sand, waved lamina?, 3-| " 



4. White sand tinged with yellow, ... 4 " 



5. Sand similar but differing in color and direction 



of laminae, 4 ."" 



6. Sand red, waved lamina?, - - - - 30 "' 



7. White clay, 4 " 



8. White sand tinged with red or yellow, - - 4 "" 



9. Clay, white like No. 7, 



d 



10. Sand, white like No. 8, - - - - 3 



