BANDED CLAYS. 19 
ice not far off. A shifting of the glacial stream nearer this locality might also 
explain the increase in thickness. Just above these bands comes a zone of 
highly contorted layers two feet thick (No. 8, 9), with till-like material two 
inches thick on top, with some of the pebbles pressed into the contortions. 
The thickness of this zone of disturbance varies considerably from north to 
south, and there are places where the till appears to be absent. The top of 
the till layer is uneven and the till layer itself is extremely variable in every 
way. It would appear as if an iceberg of considerable size had dragged over 
the bottom, destroying some layers, contorting many of those below, and leay- 
ing a deposit of till on the top and here and there pressing pebbles down into 
the folded bands. 
Above this very highly contorted zone come two feet six inches of beauti- 
fully banded clays (No. 10), with an average thickness of one half inch each. 
Above these again comes another contorted zone two feet thick (No. 11) with 
a till deposit on top similar to the contorted zone, with its till deposit described 
above. Next come three feet of regular banded clays (No. 12) with deposits 
averaging one half inch to the year. 
Above these layers comes another contorted zone one foot two inches thick 
(No. 18) with till material and pebbles. Above this zone comes. one foot three 
inches (No. 14) of banded clay layers averaging about one half inch. Above 
these a contorted zone with till one foot thick (No. 15). Then come annual 
deposits ten inches thick averaging one half inch each (No. 16). Above these 
a contorted zone four inches thick with included pebbles (No. 17). It must be 
noted here that in the thinner contorted zones the till is correspondingly scarce 
and mixed with the folds of the contortions to a greater extent. Above the 
thin contorted zone (No. 17) come five inches of annual deposits (No. 18), 
with an average of one half inch to the year. Above these comes another 
contorted zone six-inches thick (No. 19) with very few pebbles and little till. 
Then come one foot three inches of annual deposits (No. 20) averaging one half 
inch each. Next above these layers is another contorted zone four inches 
thick (No. 21) with a few pebbles. Above this zone annual layers were deposited 
for at least 400 years without any disturbing bergs whatever (No. 22). 
It will be noted in Figure 1, that the contortions are greater in the lower 
zones than in those which follow. It is also to be noted that the till deposits 
of these larger contorted zones are more marked than in the thinner zones above, 
that in these thinner zones the till is almost wanting, only pebbles being found, 
here and there, mixed with the folds. The thinner and thinner zones of con- 
