General Slocum Memorial Study Act - Directs the Secretary of the Interior, acting through the Director of the National Park Service, to study in Bronx County, New York, the shoreline of the area roughly bounded by 149th Street on the west and Oak Point Rail Yard spurs on the east, including North Brother Island, to evaluate the national significance of the area and the suitability and feasibility of designating the area as a unit of the National Park System.