I Mr. R. Beuce Foote on the occurrence of 



old ruined pagoda at the northern end of the Numbaucum 

 tank. It was not long before we found several finely shaped 

 quartzite Implements in situ, imbedded with numerous 

 quartzite pebbles in a bed of hard ferruginous laterite con- 

 glomerate which there rests unconformably on the plant 

 shales. 



The Implements in situ were found at depths below the 

 surface varying from three to eight or ten feet, and often 

 so tightly impacted as to necessitate some little labour with 

 the hammer to extract them uninjured. 



Since the discovery of the Quartzite Implements at Pala- 

 veram and in the Atrampakkam nullah, they have been met 

 with and collected at numerous other places in the Madras 

 and North Arcot Districts. The list of such places given 

 in the Appendix shows the wide distribution of the Imple- 

 ment bearing gravels, since* the deposition of which the 

 geological features of this part of the Carnatic have under- 

 gone material alterations. The names of the persons by 

 whom the Implements were first collected are also given in 

 the Appendix. 



Geological features of the Implement bearing formations. 



The circumstances under which the Implements are found 

 occurring now demand some attention, as the formations 

 they have been found in do not appear all to belong to the 

 same series. They have been found in typical unaltered 

 laterite conglomerates of uncertain age, but very probably 

 younger than the typical laterite, and in lateritic gravels 

 and sands. 



The first Implement discovered was derived from the 

 lateritic gravel at Palaveram, which occurs on the north 

 side of the Cantonment in a thin bed resting on the gneiss. 

 South West of the Cantonment and also on the south side of 



