. Contributions to Canadian biology . he difference in level often amountsto fifteen inches or more, the lower level being associated with offshore winds andthe higher level with inshore winds. The movement of the entire body of water inthis way produces currents in and out among the islands and assists in keeping theshore zone free from all sediments of a lighter nature. Shoal areas thus consistof cleaner rock than is found inland, and such sand beaches or channels as existare likely to be formed of clean sand rather than a mixture of sand and mud. The fact that the inland water courses conne
. Contributions to Canadian biology . he difference in level often amountsto fifteen inches or more, the lower level being associated with offshore winds andthe higher level with inshore winds. The movement of the entire body of water inthis way produces currents in and out among the islands and assists in keeping theshore zone free from all sediments of a lighter nature. Shoal areas thus consistof cleaner rock than is found inland, and such sand beaches or channels as existare likely to be formed of clean sand rather than a mixture of sand and mud. The fact that the inland water courses connected with this Archean area areoccupied by brownish muskeg water means in general that a large volume of thiswater, together with a considerable amount of organic detritus, is constantlybeing carried into Georgian Bay. Here it comes into contact with the clear, crystal-line water of the main body of the bay, and quickly loses its identity. In generalthe shore water shows little of the inland or muskeg character, though it is slightly. Fig. 1. Narrows, Go Home River.
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