1898.] NATURAL SCIENCES OF PHILADELPHIA. 461 



08 



a) 



NEW CRETACEOUS FOSSILS FROM AN ARTESIAN WELL-BORING AT 



MOUNT LAUREL. N. J. 



BY C. W. JOHNSON. 



The following material was obtained by Mr. Lewis Wool man 

 from tLe borings of an artesian well on the farm of Mrs. Samuel 

 Shreeve, Mount Laurel, Burlington County, N. J. The well was 

 put down on the 70 feet contour near the base of the southern slope 

 of Mount Laurel. The following section, published by Mr. Wool- 

 man, 1 was given him by the contractor, Mr. Wm. C. Barr: — 



Commenced in the bottom of 



a dug well at the depth of... 25 feet. 



Reddish-gray sand 31 feet — 56 feet. 



Black clay 175 feet = 231 feet. 



A few molluscan fossils at 



about 100 feet. 

 Numerous mollusks at 150 " Matawan cla 7 marls ' y § 



to 160 feet. 



Tough green clay 30 feet = 262 feet 



Dark-bluish clay 42 feet = 304 feet J 



Gray sand, water bearing 2 feet = 306 feet. Sewell water horizon. 



Stopped on a whitish clay. 



Mr. Woolman states that : " The whitish clay on which this bor- 

 ing stopped is probably equivalent in horizon with certain alternat- 

 ing laminse of whitish clays and sands that were found near the bases 

 of the wells at the Wenonah Hotel and at Sewell. Beneath these 

 laminae, at the last two named localities, occur coarse sands and 

 gravels with large pebbles, forming an open stratum from which an 

 abundant and excellent supply of water is obtained. The water 

 horizon reached at Mount Laurel may be considered as practically 

 the same. We have designated this as the Sewell water horizon. 

 Its position is at the base of the Matawan clay marls and the top of 

 the Raritan plastic clay series, and has a thickness, if we may judge 

 by the boring at Sew r ell, of at least forty feet." 



A comparison of these fossils with those obtained by the writer for 

 the Museum of the Wagner Free Institute of Science from the banks 

 of theChattahoochie River, below Eufaula, Alabama, shows that this 



1 Report on Artesian Wells in New Jersey, by Lewis Woolman, from the 

 Geol. Survey of N. J. Ann. Rept. for 1897, p. 262. 



