THE PINY BRANCH QUARRIES 



39 



shallow. The dark mold of the surface was about i iuches deep, and 

 between the flrst and tenth foot of the section yielded numerous flaked 

 stones and many artificial fragments and flakes: beneath tliis and rest- 

 ing on tlie uneven surface of the gneiss was a foot or more of ({uite 

 compact gravelly clay, containing a few pebbles and occasionally a small 

 bowlder; at the base the deposit contained much mica, derived from 

 the decaying gneiss on which it rests. In this lower gravel there were 

 no traces of art. Up to tlie twentieth foot these conditions remained 

 practically unchanged. It will be seen, however, by reference to the 

 longitudinal section (plate Vi), that the surface of the gneiss rises 

 less rapidly than the surface of the slope, and that the talus gravels 

 increase in thickness to 3 feet. These pass down into a layer of pink 

 and white clay, which 

 rests on the gneiss. 



i"^s-^p==^^s;i<pg^_2^-sCE?f---j2-Sfic? 



o , 



■■"••d'°.'.-o- 



':v::c:?^:'^/-.'^iS^ 









00¥VLDS^ C/tAVft . 



Worked specimens 

 were found as before 

 in the top soil, and 

 artificially broken 

 bowlders occurred in 

 the gravel a foot 

 deep. In the lower 

 part of the dark soil 

 a small jiocket or 

 cluster of chips was 

 found, and between 

 the tenth and twen- 

 tieth foot several 

 chipped stones in 

 various stages of 

 elaboration were un- 

 earthed. The cross 

 section at the twen- 

 tieth foot is shown in 

 figure 6. Through- 



... 1 Fig. C — Cross section lit tho twentieth fuot. 



out the gravel occa- 

 sional bowlders were found, some reaching 6 inches in diameter. From 

 the twentieth to near the twentyfifth foot the conditions and the con- 

 tents of the section showed no important change. The dark soil reached 

 a thickness of 8 inches, and was underlain by a bed of light sandy sub- 

 soil, not before differentiated, about a foot thick. Many i)artially 

 shaped stones were found in these beds. Beneath this again were 

 gravels and gravelly clays. 



At about the twentyfifth foot the conditions of the deposits were 

 observed to change. The limit of the compact gravels and clays form- 

 ing the base of the deposit was reached, and a nniss of rather loose 

 heterogeneous material was encountered. The edge of an ancient 

 escavatiou had been reached, though this fact was not at first appre- 



