During the summer of 1946 the United States Geological Survey continued its program of stratigraphic and structural investigations in Naval Petroleum Reserve No. 4, northern Alaska. This report summarizes the results of work in the area of Maybe Creek (see inset, fig. 1). The area studied is southwest of Umiat and includes about 500 square miles lying generally between the headwaters and mouth of Maybe Creek. Structural data covering approximately 250 square miles of this area has been compiled from aerial photographic studies. The area is bordered generally on the north by the lake country and on the west by the Ikpikpuk River. Most of the area is north of Maybe Creek except for that part extending for 6 miles south of Maybe Creek between longitudes 153° 30' W. and 154° 20' W. The latitude of Maybe Creek is about 69° 15' N. The stream flows generally westward and at longitude 154° 40' W. unites with the eastward-flowing Kigalik River to form the Ikpikpuk River, which has a northerly course across the Arctic Slope to the ocean.
