. Bulletin of the Geological Society of America. Geology. 490 A. W. G. WILSON SHORELINE STUDIES ON ONTAEIO AND ERIE the Niagara, and the Saint Lawrence rivers. At these points there is a small but constant current, really a portion of the body current, but much more readily noted than the body current of the main lake. These local currents are too weak to be active transporting agents. In the case of the Detroit river the occurrence of delta deposits at its mouth, although in part undoubtedly due to wave action and other local causes, may be due to the river's ability to transport materials su
. Bulletin of the Geological Society of America. Geology. 490 A. W. G. WILSON SHORELINE STUDIES ON ONTAEIO AND ERIE the Niagara, and the Saint Lawrence rivers. At these points there is a small but constant current, really a portion of the body current, but much more readily noted than the body current of the main lake. These local currents are too weak to be active transporting agents. In the case of the Detroit river the occurrence of delta deposits at its mouth, although in part undoubtedly due to wave action and other local causes, may be due to the river's ability to transport materials supplied by the waves on lake Saint Clair, the materials being carried down the channel of the river by the current to lake Erie and being deposited in the latter lake as soon as the current is arrested by the lake waters. In the case of the Niagara river the discoloration of the water shows that a small amount of material in a very fine state of division is carried out into lake Ontario. Lake FiGDRB 6.—Z>j-jft Currents in Lake Ontario Two miles off the mouth of the river the coloration has disappeared and the current has become merged with the general drift of the surface waters of the lake. It has also been noted that the outer portion of this current in lake Ontario is shifted by the winds. The waters of the Saint Lawrence where it leaves the lake are clear and practically free from sediment. In lakes Erie and Ontario the general study which has been made by the officials of the United States Weather Bureau has shown the existence of a slow general set of the mass of the water toward the outlets. Where, by the action of the wind, surface currents have driven more water to the eastward of the lakes than can well pass through the discharge, there must be more or less of a return current. In the case of these two lakes I. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appe
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