NO. lO SECOND RKPOKT ON FOLSOM COMPLEX ROBERTS II 



course of the older one. These features do not show as well in the 

 diagrams of the trench walls as they do in the drawings of the section 

 faces, which are not reproduced in this report, but study of sections 2 

 and 3, figure I, will show their beginnings as they appeared in the walls. 

 The significance of this old stream is that its original channel was 

 cut after the deposition of the soil layer which contains man-made 

 objects and that it removed this dark stratuiji as it progressed. Fur- 

 thermore, the channel and its history as briefly sketched provide evi- 

 dence that there was a higher and more extensive ridge above the site 

 than that of the present day. Now there is not sufficient run-ofif, even 

 after the heaviest rains, to form such a course. Numerous sand and 

 gravel lenses scattered along the length of the trench demonstrated 

 the occurrence of subsequent washes which carried material down 

 from the higher slopes. With the exception of sections 13-15 there 

 were no clear-cut channels, however. Those sections showed that 

 a wide, shallow stream had crossed that point after considerable ma- 

 terial had been deposited above the old occupation level. 



In trench B the largest showing of specimens was in sections 7 

 through 10, although i through 5 had a consistent yield. The per- 

 centage dropped in 6 and then swung upward to the peak which was 

 reached in 9. It then dropped ofif to section 12 which contained no 

 implements, although some chips and flakes were found there. From 

 this point to the end of the trench there was a gradual increase in re- 

 turns, but the yield was not as good as in the earlier sections. In sec- 

 tion 5 the black layer on either side of the channel contained a number 

 of large nodules and flakes. None were found in the channel, how- 

 ever. On the west side of the trench at the lower end of section 12, 

 just below peg 13, was a shallow, saucer-shaped depression in the 

 top of the old clay bed. The concavity held a quantity of charcoal and 

 suggested that it might have been a shallow fire pit, although the 

 underlying clay showed no signs of the effects of heat. It is possible 

 that a small fire burning for a short time in such a pit would not cause 

 sufficient discoloration to remain over a long period of years or that 

 such reddening as did take place was subsequently leached out. There 

 were some small fragments of burned bones in the charcoal and 

 around the borders of the basin. The lens of charcoal extended into 

 section 12 a distance of 2 feet 6 inches (76.20 cm). It did not appear 

 in section 13. It projected into the trench for 2 feet (60.96 cm) in 

 section 12. The percentages of implements for the various sections in 

 trench B are as follows : o, 1.7 percent ; i, 7.9 ; 2, 6.2 ; 3, 5.2 ; 4, 7.1 ; 

 5, 6.2; 6, 1.7; 7,7.9; 8, 15.8; 9, 17.5; 10, 9.7; II, 44; 12, o; 13,0.9; 

 14,2.6; 15, 5.2. 



