Bt1--23 to 51 centimeters (9.1 to 20.1 inches); silty clay loam; moderate medium subangular blocky structure; firm, moderately sticky, moderately plastic; common very fine roots between peds and common medium roots between peds; 35 percent distinct clay films on surfaces along pores; 5YR 2.5/1) manganese masses; 5 percent sandstone fragments; gradual wavy boundary. Lab sample # 13N01588