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, <br /> � Bt3--38 to 53 inches; brown (lOYR 4/3) clay loam; weak medium subangular blocky structure <br /> parting to weak fine subangular blocky; firm; common distict very dark brown (lOYR 2/2) clay <br /> � films on faces of peds; about 5 percent gravel; few fine distict brown (7.SYR 4/4) Fe <br /> concentrations; moderately acid; gradual smooth boundary. (Combined thickness of the Bt <br /> horizons is 20 to 40 inches.) <br /> � 2BC--53 to 65 inches; light olive brown (2.SY 5/4) loam; weak fine subangular blocky structure; <br /> few distinct dark brown (lOYR 3/3) clay films on faces of peds; friable; about 8 percent gravel; <br /> � about 2 percent cobbles; few fine distinct brown (7.SYR 4/4) Fe deletions; slightly effervescent; <br /> slightly alkaline; gradual wavy boundary. <br /> � 2C--65 to 80 inches; light olive brown (2.SY 5/4) loam; massive; friable; few concentrations of <br /> light gray (2.SY 7/2) calcium carbonates in pores; brown (7.SYR 4/4) soft masses of iron- <br /> manganese �n nodules; about 8 percent gravel; about 2 percent cobbles; common medium <br /> � prominent dark yellowish brown (lOYR 4/6) Fe concentrations and common medium distinct <br /> gray (2.SY 5/1) Fe depletions; strongly effervescent; moderately alkaline. <br /> TYPE LOCATION: Le Sueur County, Minnesota; about 3 miles west and 3 miles south of <br /> � Montgomery; about 300 feet east and 800 feet north of the southwest corner of Sec. 19, T.111N., <br /> R.23W.; USGS Montgomery quadrangle; lat. 44 degrees 24 minutes 3 seconds N., and long. 93 <br /> � degrees 38 minutes 41 seconds W., NAD 27. <br /> RANGE IN CHARACTERISTICS: Depth to free carbonates range from 20 to 60 inches. <br /> Gravel of mixed lithology, but dominated by shale fragments, typically make up 2 to 8 percent of <br /> � the volume of the series control section, but the upper part of the profile in some pedons contains <br /> less than 2 percent gravel. Rounded shale fragments dominate the coarse sand fraction. Soil <br /> saturation occurs above a depth of 40 inches in 6 out of 10 years. <br /> , The Ap or A horizon has hue of lOYR, value of 2 or 3 and chroma of 1 or 2. It is clay loam, silty <br /> clay loam, loam or silt loam. The reaction is moderately acid to neutral. <br /> � Some pedons have a thin E horizon. <br /> � The Bt horizon has hue of lOYR or 2.SY, value of 4 or 5, and chroma of 3 to 5. Faint to <br /> prominent Fe concentrations and depletions commonly are above a depth of 40 inches. Redox <br /> depletions do not occur in the upper 10 inches of this horizon. The upper 20 inches of the Bt <br /> � horizon typically contains 35 to 45 percent clay. B/A clay ratios are 1.2 to 1.4. The Bt horizon is <br /> clay loam, silty clay loam, or clay. The reaction strongly acid to neutral. <br /> � The 2BC horizon has properties similar to the 2C horizon. Some pedons have a 2BK horizon. <br /> The 2C harizon has hue of lOYR or 2.SY, value of 4 or 5, and chroma of 2 to 5. It is clay loam or <br /> loam. The reaction is slightly alkaline or moderately alkaline. <br /> � COMPETING SERIES: There are no competing series. <br /> i <br /> ! <br /> ! <br />