. Annual report of the Regents. New York State Museum; Science. 658 NEW YORK STATE MUSEUM sequent closing might under the local circumstances have accom- plished, as in existing glaciers, such minor changes of water level.^ A glance at the topographic map will show that from Flushing bay, the shore line of which at the time the College Point delta was deposited must have been about 40 feet higher than now, there is a well defined channel extending westward from Newton through Winfield Junction to the head of ]N"ewtown creek. From this point escape of the water to or connection with the se
. Annual report of the Regents. New York State Museum; Science. 658 NEW YORK STATE MUSEUM sequent closing might under the local circumstances have accom- plished, as in existing glaciers, such minor changes of water level.^ A glance at the topographic map will show that from Flushing bay, the shore line of which at the time the College Point delta was deposited must have been about 40 feet higher than now, there is a well defined channel extending westward from Newton through Winfield Junction to the head of ]N"ewtown creek. From this point escape of the water to or connection with the sea was possible either along the northwestward course of J^ewtown creek to the East river at Hunters point or, if that way was still blocked by the ice sheet, along a more southerly course between Williamsburg and Brooklyn into Wallabout bay, the highest land there lying between the 20 foot and 40 foot contours. From Wallabout bay a somewhat winding passage below the 40 foot level was open, permitting dis- charge into or connection with Gowanus bay just north of the moraine at the J^arrows. As for the possibility of the 40 foot delta at College Point having been deposited at sea- level, it should be Fig. 9 Cross-section of the structures observed in the Col- Stated that similar f Or- lege Point delta, a, fore-set beds; 6, top set beds; c, , • i? morainal ridge or bar matlOnS north of the moraine indicate wide- spread waters at about this level. When these have been fully investigated it may be necessary to admit a submergence to this extent. What is stated here must be taken with this reservation in mind. ^ See, on the formation of temporary lakes at the present time, Edouard Suess, La face de la terre. Paris, 1900. 2 : 590-97, and the authors there cited; also De Lapparent, Traite de geologic. 4me ed. Paris, 1900. p. 303-3, on the sudden drainage of glacial lakes. For American glacial lakes of the class here described,. see H. B. Ktimmell, Lake Passaic, an extinct gla
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