PLATE 8. 
Figure 1, 2—— ContortED BANDS LYING BETWEEN THE UNDISTURBED BANDS BETWEEN NortH BaTH 
AND Lisson, N. H. 
In this Plate a comparison is made between clay and slate in cases where a contorted zone lies 
between undisturbed layers. The contorted zone in Figure 1 is twelve inches thick and in Figure 2 
eleven inches. The banding is of the same nature in both views. The peculiar mashed appearance 
is also the same in both views. Pebbles may be seen mixed with the contortions in Figure 2, but none 
were found in the specimen shown in Figure 1, but they may occur. At Woodsville pebbles were found 
in many contorted zones. These views show typical cases of what are believed to be deformations 
due to the grounding of bergs. The pebbles must have come from the melting of the ice at the bot- 
tom of the bergs, which would often contain rock materials. If the bergs should become inverted 
in the water on breaking away from the ice front, thus presenting a clean surface on the bottom, neither 
pebbles nor till would be found in the contorted strata underneath. 
