18 A GEOLOGICAL HISTORY* 



foot-marks (two left feet and a right one) on the 

 smooth surface of the Limestone, on the north 

 end of this formation near the road. These foot- 

 marks appeared to me to have been made thus : 

 first, the person, whoever he was, who made them, 

 had stept in the mud, and then walked up the rock ; 

 the mud from his foot gave an outline, and then 

 some sharp instrument was used to check and 

 trace that outline ; an Indian stone axe, or a steel 

 one may have been used, for these marks did not 

 seem to be of much antiquity : they were shown 

 as a great curiosity under the denomination of 

 Indian tracks, and were destroyed by the quarry- 

 men, upwards of 30 years ago. Judging from 

 this, and similar wonders which I have seen and 

 heard of, I must infer that the " foot-marks," &c, 

 &c, of the would-be geologists, are not exactly 

 w 7 hat they are cracked up to be. This formation* 

 rests on Granite. For list of minerals imbedded 

 in it, see catalogue. 



8th Diluvium. — (See plate 1, fig. 1 and 2, 

 marked 8.) This formation covers almost all 

 the island ; but under the city, and at the lower or 



* Boulders of this Limestone are seen at Newtown, (Long Island,) which 

 is about 10 miles south of Kingsbridge — a piece of one, on the road to 

 Williamsburgh, would weigh at least 500 pounds ; it has been broken to 

 make stone wall. 



