“…This may be an artifact of local conditions in the small geographic range of the sample. In other Midwestern states many SSWs denoted as seeps in the literature have been described as having histic deposits (Phipps and Speer 1958, Parker and Ebinger 1971, O'Flaherty et al 1975, Ebinger and Bacone 1980, Homoya 1984, McClain et al 2008, Hicks 2012. However, few of these studies have provided detailed descriptions of the depth of the histic material, instead using indefinite terms such as "deep" and "shallow".…”