Arcola soils have weathered from Triassic and Jurassic red beds. Bucks soils have a significant increase in shale fragments in the lower part of the series control section. Chester , Chilmark , Edneyville , Glenelg , and Thurmont soils have coarse fragments dominated by either quartz, quartzite, granite, gneiss, or schist. Collington and Freehold soils have moderate amounts of glauconite. Murrill soils have, within the series control section, a lithologic discontinuity below which there is a significant decrease in coarse fragments.
Elsinboro soils have many flakes in the lower part of the series control section.
Frankstown soils have coarse fragments dominated by leached siliceous limestone or chert. Gilpin and Syenite soils have bedrock at depths of less than 40 inches. Matapeake soils are underlain by sandy coastal plain sediments. Meadowville soils have, within the series control section, a lithologic discontinuity below which there is a significant increase in sand content. Nixon soils have coarse fragments which about 70 percent are cobblestones.