212 
Collie—Geology of Conanicut Island, R. 1. 
The strike is slightly E. of N. and W. of S. for the rocks as a whole, 
as indicated by the banded schists, though there are many local 
divergences from these directions. On the east shore the light 
schists extend from the slate to Freebody’s Hill, though the 
dark members of the series are not wholly wanting, north of 
Freebody’s Hill the black schist predominates. 
At certain centres the schistosity and bedding have no uni¬ 
form dip; there is confusion and complication in their arrange¬ 
ment. The schistosity constantly changes the direction of its 
dip, the strata are overturned and faulted. Qne of these centres 
of confused stratigraphy is Freebody’s Hill. The dynamic forces 
producing folding and schistosity, acting from several directions, 
seem to have met in these centres as foci, maximum effects of 
pressure made by forces acting N. E. to S. W. and N. W. to S. E. 
have crossed each other at these foci and have here therefore 
produced a maximum result. The two forces meeting at these 
focal points combine to make it an area of greatest disturbance. 
These points are regions of very marked disturbance in contrast 
to the surrounding areas which are much less disturbed. In the 
less disturbed region this same phenomenon can be observed on a 
much smaller scale. A few closely appressed folds will be found, 
followed by an area in which disturbances are scarcely noticeable, 
then a closely folded area, then another comparatively undis¬ 
turbed. This sequence of disturbed and undisturbed regions on 
large and small scales is observable in all parts of the island. The 
effects of pressure are cumulative, not evenly distributed, just 
as in wave action, where waves cross each other diagonally, there 
are certain points or foci in which there is a culmination of effects, 
so in the folding and disturbance of the earth’s crust there are 
points of greatest disturbance, because at these points the 
forces acting from different directions have met and have by 
mutual interaction added to the dynamic effect that each sepa¬ 
rately possessed. 
In Conanicut these forces did not act at the same time, but at 
different periods, possibly widely separated in time. The force 
coming from the N. W., acted first, producing certain dynamic 
results, the N. E. force acted subsequently and added to the 
first results certain others, especially where the greatest stress 
