You searched for: Place behind low dunes 600 ft. N. of mouth of the Au Sable Riv. on L. Huron on S. side of town of Oscoda. Au Sable Twp. T23N, R9E, Sec.3, SE1/4 Remove constraint Place: behind low dunes 600 ft. N. of mouth of the Au Sable Riv. on L. Huron on S. side of town of Oscoda. Au Sable Twp. T23N, R9E, Sec.3, SE1/4 Topic Magnoliopsida Remove constraint Topic: Magnoliopsida