The 2R or 3R horizon is horizontal bedded shale or siltstone. Niagara soils do not have bedrock within 60 inches. Aptakisic and Starks soils are stratified in the lower part of the series control section. Creal soils have eluvial horizons more than 14 inches thick. Fitchville, Iva, Kendall, and Stronghurst soils do not have 2B and 2C horizons within either the series control section or within depths of 40 inches.
Waynetown soils have a sandy substratum.
Hatmaker and all the soils indicated above do not have bedrock at depths of 40 to 60 inches. The Canadaigua, Caneadea , Churchville , Derb , Rhinebeck and Wallington series are in closely related families. Canadaigua and Derb soils do not have argillic horizons. Caneadea, Churchville, and Rhinebeck soils have more than 35 percent clay in the argillic horizon. Wallington soils have a fragipan.