134 PROCEEDINGS OF THE ACADEMY OF [1890. 



part collated with 37 additional specimens from well No. 4. From 

 this the accompanying section has been constructed, which it is 

 believed is an accurate representation and grouping of strata. 



Upon the left is a minute description of the various changes in 

 material copied verbatim from a record furnished by J. H. Moore, 

 with the insertion, however, in brackets of the depths of the various 

 water-bearing hoi'izons, as learned from the development of the other 

 wells. Upon the right the section is subdivided so as to show the 

 grouping of the strata into larger beds having certain characteristic 

 features. For convenience, each of these is marked by a letter, and 

 a corresponding letter heads each paragraph relating to the same in 

 the succeeding detailed description. 



A — Underneath 30 feet of ordinary beach sand there exists 15 feet 

 of blue nuid. This was probably the bottom of an old thoroughfare 

 or channel. It contains the usual shells of the coast, the oyster, the 

 clam and the scallop, and also one single minute organism belonging 

 to the foraminifera and identical with the only living species — a 

 No7iionina^no\\ found on the beach. 



B — Beneath this is a series of sands and gravels 220 feet in thick- 

 ness, varying from whitish to yellow in color and alternating from 

 very fine sand to very coarse gravel. 



At 84 to 116 feet and again at 228 feet, these gravels exhibit 

 pebbles containing fossils that show them to be of Devonian and 

 Silurian origin. Similar fossiliferous pebbles are plentiful at Straf- 

 fordville north of Tuckerton, and also in the cuts of both the 

 Camden and Atlantic and the Reading Railroads, at about 14 miles 

 from Atlantic City. All of these localities are about 60 feet above 

 tide. Certain yellow gravels and sands at 135 to 160 feet, may be 

 seen apparently matched on a hill N. E. of EUwood, 120 feet 

 above tide and 21 miles distant. Specimens from the hill and the 

 well are quite undistinguishable. These data indicate a dip of 

 from 12 to not over 15 feet per mile for these gravels. The gravels 

 and underlying white sands of this section are the same respectively 

 as are referred to in the New^ Jersey survey reports as the yellow- 

 gravels and the glass sands. The former have been named by Prof. 

 H. Carvill Lewis, the Glassboro gravels. They are spread over the 

 Atlantic seaboard in this and other States southward and are re- 

 garded by many geologists as Quaternary in age. This section 

 terminates in the well at about 265 feet. 



