United States, Illinois, La Salle Co., S Ottawa; NW side of IL 71; excavated low area at SE side of IL River opp. Mayo Island; 0.3 mi. NE of N 2650th Road; Ottawa 7.5 min quad. T33N, R3E, Sec. 22, NW¼.
41 -88
143 meters
470 ft
Margin of calcareous-salt panne left after silica sand mining; seepage area; with Leptochloa, Solidago; open margins of wetlands; salty silica sand over St. Peter's Sandstone.