Archaeological Investigations in Jefferson County, Mo. 193 
implements scattered around it but there was no pottery except at 
B and C in Plate XA, which is the contact zone between the early 
and later silt fills. The two latter occupations must have been 
at a later interval of time than those implements that were found 
on the original shelter floor but were located from the original 
silt fill. 
One very large irregular fireplace at the northwest end of 
the shelter (See E of Plate X A) and several other smaller 
areas containing pockets of chipped implements were found at 
depths of from 60 to 100 centimeters (20 to 40 inches) under 
the overhang in the lowest levels of the later silt fill. With these 
chipped implements was a very small number of sherds. Both 
the implements and the sherds were stained by iron precipitate 
ieached out from superimposed deposits. Animal bone remains 
were very small and fragmentary. An antler tine was found in 
the fireplace and this was definitely mineralized. Typical stone 
implements are concave based projectile points similar to those 
from the Signal Butte I Nebraska site and long side notched 
projectile points typical of the Black Sand component from 
Illinois (See Plate XI B). The few sherds occurring were of 
Hidden Valley Crushed Quartz ware. 
Evidences of more recent occupations have been found al- 
most over the entire shelter. In certain areas such as the north 
extremity of the shelter, these occupations lie close to the sur- 
face but throughout most of the shelter area they are often 
found at considerable depths such as in the area just north of 
the large boulders, and in pockets clear down to the original 
sand floor at the center of the shelter. Under the center of the 
shelter overhang they are found down to the original sand floor 
due to the stream erosion and appear to be in secondary posi- 
tion, but a few meters north of this point and also just north 
of the large boulders at the south end of the shelter the more re- 
cent occupations extend down approximately 60-75 centimeters 
(25-30 inches). However, it appears that at no time in the his- 
tory of the occupations of the shelter was the upper surface 
completely level. It is not uncommon along the boundary of the 
