602 Vestiges of Glacial Man in Minnesota. [ June, | 
wheels. This layer or stratum was still intact on the north and 
south, and partially so on the east, in which direction it had, how- 
ever, at certain points suffered displacement by wagoning, It ex- 
tended in what at the time appeared to be a nearly horizontal 
plane, into the terrace, in the sloping edge of which the notch, 
opening in the west bank of the terrace and truncated at its edge, 
is cut. Its outlines, lying within the walls of the notch, were 
masked against ordinary observation by thin slides of soil from 
higher surfaces. Both the inferior and superior planes of the 
quartz bearing stratum were sharply defined. Its horizontal 
boundaries had not been distinctly reached in any direction at the 
time of excavating for the road, and they have since been, at 
least partially, and perhaps wholly, obliterated by the grading 
and digging over to which the spot has been subjected. At the 
west the stratum reached to the limit of the terrace, which is here 
bounded by a steep slope. The quartz-bearing layer averaged à 
few inches only in thickness, varying a little as the included 
pieces happened to be of smaller or larger size. The eg 
were commonly closely compacted, so much so that one might 
sometimes extract hundreds of fragments, many of them vey — 
small ones, of course, from an area of considerably less than 4 
Square yard. 
The quartz bed, as far as examined, rested u 
sandy soil which passed downward into a coarse Stone ; 
immediately overlying till. Upon the quartzes again, were 7 
imposed drift accumulations extending up to the surface 0 
terrace. These were characterized, by geological WPT 
sand above and sand and gravel below. The pebbles 
pon a few inches of 
IEE PERR I ERR ESL A Die EENT 
cabia | 
gravel were small and well rounded, and were svar d 
angular than those of the rubbish beneath. Bee wee plane 
quartzes lay at a level twelve or fifteen feet lower t cated i 
of the terrace top. The exposed deposit has ais y, but thest : 
toward the west, and apparently also toward the eae a j 
inclinations, particularly the former, may be y early stage 
due to the giving way of underlying rubbish. At fi ape 
of investigation the soil above the quartzes presente heas l 
no contrast in color with that of the soil below pie into the : 
penetrating some little distance, in a horizontal pages to show 
terrace, however, the superior and inferior pape g on a dull 4 
a plain divergence in point of tint, the lower one © : 
