C1--84 to 128 centimeters (33.1 to 50.4 inches); brownish yellow (10YR 6/8) broken face and red (2.5YR 4/8) broken face silty clay; massive; friable, very sticky, very plastic; few very fine roots in cracks and few coarse roots in cracks; 10YR 7/1) reduced matrix and 10YR 3/1) manganese masses; 35 percent unspecified fragments; abrupt wavy boundary. Lab sample # 13N01590