350 Geology of Long Island. 



Surface loam, . - _ 15 ft. 



Drift, 36 " 



Yellow gravel, - - - - 81 " 



Sand, 15" 



Sandy clay with a carbonized branch, 4 " 



Yellow clay, - - - - 3 " 



Blue and gray sandy clay with pyrites, 30 " 



Micaceous sand, - - - - 14 " 6 in. 



Total, - - 198 ft. 6 in. 



From the same authority I have the following section of a well 

 on Barn urn's Island : 



Sand and gravel, stratified, - - 70 ft. 



Clay and clayey sand with lignite, - 56 " 

 Gravel and fine sand with clayey sand, 44 " 

 Blue clay, clayey sand and silt, with lig- 

 nite and pyrites, - - 168 " 



Total, - - 338 ft. 



In the third stratum, at a depth of 168 feet, a fragment of the 

 stem of a crinoid was found which, together with a complete set 

 of specimens from the well, is in the collection of the Long Island 

 Historical Society. The fossil fragment is probably from some 

 Palaeozoic formation, and has no special importance. 



At Orossman's brick-yard in Huntington, on the east shore of 

 Cold Spring Harbor, we have the section shown in Fi<j. 2 of plate 

 XXVII. The ridge which is intersected here trends a little E. 

 of N. The section is as follows : 



Till and stratified drift, - 



Quartz gravel, .-"•-- 



Red and blue "loam" or sandy clay, 



Diatomaceous earth, 



Yellow and red stratified sand, - 



Red plastic clay, - 



Brown « " - 



Total, ... 143 ft. 



10 ft. 



45 



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20 



a 



3 



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20 



t i 



20 



a 



25 



a 



