In preparation for excavation, a vertical rod was driven in the
southern sector and the datum point established twenty inches above
the ground surface at this spot. A second stake was located on
a north-south line from the first (using magnetic north) at the
opposite end of the shelter. A horizontal line connecting these
stakes at the level of the datum point was considered the baseline.
The area of the rock shelter to be excavated was then laid out in
one yard squares. Letters were assigned to the grid lines running
east-west, and numbers to those running north-south. Each square was
designated by the grid lines intersecting at its northeast corner.
To facilitate exact measurement, a series of stakes was set up along
the baseline at intervals of two yards. From locations on the stakes
on the same horizontal plane as the datum point, lines were extended
to corresponding pitons driven into the rear wall of the overhang. A
second series of connecting lines formed a suspended grid of two yard
squares.
[Illustration]
[Illustration: FIGURE 4—LoDaisKa Site. Above, prior to excavation
(Looking North). Below, preliminary test trench. Note homogeneous
character of deposit.]
[Illustration]
[Illustration: FIGURE 5—LoDaisKa Site. Above, during excavation
(Looking South). Below, just prior to completion, all but one strand of
aerial grid removed. (Looking North).]
[Illustration: LODAISKA SITE