D04 GUAN Megapit Soils Description
| Print Date: Mar 11 2016 | Country: United States |
| Description Date: Apr 9 2015 | State: Puerto Rico |
| Describer: M. Matos, S. Rios | County: Guanica |
| Site ID: S2015PR055001 | MLRA: 271 -- Semiarid Mountains and Valleys |
| Site Note: | Soil Survey Area: PR787 -- San German Area, Southwestern Puerto Rico 3-MAZ -- Mayaguez, Puerto Rico |
| Pedon ID: S2015PR055001 | Map Unit: LcE -- La Covana-Limestone outcrop-Seboruco complex, 12 to 40 percent slopes |
| Pedon Note: | Quad Name: Punta Verraco, Puerto Rico |
| Lab Source ID: KSSL | Std Latitude: 17.9688200 |
| Lab Pedon #: 15N0543 | Std Longitude: -66.8688800 |
| User Transect ID: | |
| Soil Name as Described/Sampled: | |
| Classification: | Latitude: 17 degrees 58 minutes 7.80 seconds north |
| Soil Name as Correlated: Altamira | Longitude: 66 degrees 52 minutes 8.00 seconds west |
| Classification: Coarse-loamy, carbonatic, isohyperthermic Typic Haplocalcids | Datum: WGS84 |
| Pedon Type: | UTM Zone: 19 |
| Pedon Purpose: research site | UTM Easting: 725687 meters |
| Taxon Kind: series | UTM Northing: 1988033 meters |
| Associated Soils: La Covana, Seboruco | |
| Physiographic Division: Caribbean Basin | Primary Earth Cover: Tree cover |
| Physiographic Province: Caribbean Islands Province | Secondary Earth Cover: Other grass/herbaceous cover |
| Physiographic Section: Greater Antilles (Puerto Rico) | Existing Vegetation: |
| State Physiographic Area: | Parent Material: residuum weathered from limestone and siltstone |
| Local Physiographic Area: Carenero Ward, Dry Forest; Guanica, Puerto Rico | Bedrock Kind: limestone and siltstone |
| Geomorphic Setting: on backslope of side slope of hills on backslope of side slope of hillslope | Bedrock Depth: |
| Upslope Shape: linear | Bedrock Hardness: |
| Cross Slope Shape: concave | Bedrock Fracture Interval: |
| Particle Size Control Section: | Surface Fragments: |
| Description origin: NASIS | Description database: KSSL |
| Diagnostic Features: | ochric epipedon 0 to 30 cm. calcic horizon 30 to 105 cm. |
| Cont. Site ID: S2015PR055001 | Pedon ID: S2015PR055001 |
| Slope (%) | Elevation (meters) | Aspect (deg) | MAAT (C) | MSAT (C) | MWAT (C) | MAP (mm) | Frost-Free Days | Drainage Class | Slope Length (meters) | Upslope Length (meters) |
| 8.0 | 133.0 | 220 | well |
A--0 to 30 centimeters (0.0 to 11.8 inches); clay loam, dark gray (10YR 4/1) broken face, moist; strong medium granular, and strong coarse granular structure; slightly hard, firm, moderately sticky, moderately plastic; very fine roots throughout and medium roots throughout; strong effervescence, by HCl, 1 normal; slightly alkaline, pH 7.5, Unspecified; clear wavy boundary. Lab sample # 15N02901, 15N02909
Bk1--30 to 55 centimeters (11.8 to 21.7 inches); silty clay, grayish brown (10YR 5/2) broken face, moist; moderate medium subangular blocky, and moderate coarse subangular blocky structure; very hard, extremely firm, moderately sticky, very plastic; very fine roots throughout and medium roots throughout; 5 percent distinct slickensides (pedogenic) on top faces of peds; 15 percent fine prominent 10YR 8/1), moist, carbonate masses throughout and 15 percent medium prominent 10YR 8/1), moist, carbonate masses throughout; strong effervescence, by HCl, 1 normal; moderately alkaline, pH 8.0, Unspecified; gradual wavy boundary. Lab sample # 15N02902, 15N02910
Bk2--55 to 86 centimeters (21.7 to 33.9 inches); silty clay loam, light yellowish brown (2.5Y 6/4) broken face, moist; moderate fine subangular blocky, and moderate medium subangular blocky structure; moderately hard, firm, slightly sticky, moderately plastic; very fine roots throughout and medium roots throughout and fine roots throughout; 2 percent fine prominent 10YR 8/1), moist, carbonate masses throughout and 2 percent medium prominent 10YR 8/1), moist, carbonate masses throughout; violent effervescence, by HCl, 1 normal; moderately alkaline, pH 8.0, Unspecified; clear wavy boundary. Lab sample # 15N02903, 15N02911
Bk3--86 to 105 centimeters (33.9 to 41.3 inches); silty clay loam, light yellowish brown (2.5Y 6/4) broken face, moist; weak fine subangular blocky, and weak medium subangular blocky structure; moderately hard, firm, slightly sticky, moderately plastic; very fine roots throughout; 5 percent faint pressure faces on all faces of peds; 1 percent fine prominent 10YR 5/6), moist, masses of oxidized iron throughout and 1 percent medium prominent 10YR 5/6), moist, masses of oxidized iron throughout; 30 percent fine prominent 10YR 8/1), moist, carbonate masses throughout and 30 percent medium prominent 10YR 8/1), moist, carbonate masses throughout; violent effervescence, by HCl, 1 normal; moderately alkaline, pH 8.0, Unspecified; clear smooth boundary. Lab sample # 15N02904, 15N02912
BCk--105 to 126 centimeters (41.3 to 49.6 inches); silty clay loam, light yellowish brown (2.5Y 6/3) broken face, moist; weak coarse prismatic, and weak fine subangular blocky, and weak medium subangular blocky structure; very hard, extremely firm, slightly sticky, moderately plastic; very fine roots throughout; 5 percent faint pressure faces on all faces of peds; 25 percent fine prominent 10YR 5/6), moist, masses of oxidized iron throughout and 25 percent medium prominent 10YR 5/6), moist, masses of oxidized iron throughout; 2 percent fine prominent 10YR 8/1), moist, carbonate masses throughout and 2 percent medium prominent 10YR 8/1), moist, carbonate masses throughout; strong effervescence, by HCl, 1 normal; moderately alkaline, pH 8.0, Unspecified; From 105-108 cm presence of preached water table. 80% 2.5Y 6/2; 15% 10YR 8/1 horizontal carbonate masses along of the unconformity; 5% 7.5YR 4/6 iron masses between peds.; clear smooth boundary. Lab sample # 15N02905, 15N02913
C--126 to 161 centimeters (49.6 to 63.4 inches); silty clay loam, pale yellow (2.5Y 7/3) broken face, moist; weak medium subangular blocky, and weak coarse subangular blocky structure; very hard, extremely firm, slightly sticky, moderately plastic; very fine roots in cracks; 5 percent fine prominent 7.5YR 4/6), moist, masses of oxidized iron throughout and 5 percent medium prominent 7.5YR 4/6), moist, masses of oxidized iron throughout and 20 percent medium prominent 2.5Y 6/2), moist, masses of reduced iron throughout and 20 percent coarse prominent 2.5Y 6/2), moist, masses of reduced iron throughout and 25 percent fine prominent 10YR 5/8), moist, masses of oxidized iron throughout and 25 percent medium prominent 10YR 5/8), moist, masses of oxidized iron throughout; 2 percent fine prominent 10YR 8/1), moist, carbonate masses throughout and 2 percent medium prominent 10YR 8/1), moist, carbonate masses throughout; strong effervescence, by HCl, 1 normal; moderately alkaline, pH 8.0, Unspecified; From 123-131 cm presence of preached water table. 80% 2.5Y 6/2; 10% 10YR 8/1 horizontal carbonate masses along of the unconformity; 10% 7.5YR 4/6 iron masses between peds.; gradual smooth boundary. Lab sample # 15N02906, 15N02914
Cr--161 to 203 centimeters (63.4 to 79.9 inches);, pale yellow (2.5Y 7/4) broken face, moist; massive; 5 percent fine prominent 7.5YR 4/6), moist, masses of oxidized iron throughout and 5 percent medium prominent 7.5YR 4/6), moist, masses of oxidized iron throughout and 20 percent medium prominent 2.5Y 6/2), moist, masses of reduced iron throughout and 20 percent coarse prominent 2.5Y 6/2), moist, masses of reduced iron throughout and 25 percent fine prominent 10YR 5/8), moist, masses of oxidized iron throughout and 25 percent medium prominent 10YR 5/8), moist, masses of oxidized iron throughout; 15 percent fine prominent 10YR 8/1), moist, carbonate masses throughout and 15 percent medium prominent 10YR 8/1), moist, carbonate masses throughout; strong effervescence, by HCl, 1 normal; moderately alkaline, pH 8.0, Unspecified; Moderately weathered calcareous siltstone. Lab sample # 15N02907, 15N02915.
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