Soil Survey of Sequoia National Forest, California (1996) Part II of II
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622 Dome-Chaix outcrop association, 30 to 50 percent slopes. Illlil This map unit is on mountainsides and ridges. Slope is 30 to 50 percent. The native plant communities are Yellow Pine Forest and Mixed Conifer Forest. Elevation is 5,000 to 8,040 feet. The average annual precipitation is about 24 to 51 inches. This unit is 35 percent Dome sandy loam, 30 percent Chaix sandy loam, and 20 percent Rock outcrop. Dome Chaix Rock outcrop 40 to 60 in 20 to 40 in Moderate to low Low t 5 to 6 in 3 to 4 in | 2 in 2 in I Moderately rapid Moderately rapid B B Well drained Well drained or somewhat excessively drained Rapid Rapid Moderate Moderate 0.20 0.24 ^ SM SM Intermediate Intermediate 2ep 3eP 85 to 164 50 to 84 Suitable Suitable Regeneration difficulty—d and f Summer Summer Plant competition, steep slopes II II Included in this unit are small areas of Chawanakee soils and Junipero family soils. Included areas make up about 15 percent of the total acreage. The Dome soil is deep and formed in residuum derived from granitic rock. Typically, the surface layer is grayish brown sandy loam about 7 inches thick. The subsoil is pale brown sandy loam about 21 inches thick. The subsoil is very pale brown sandy loam about 22 inches thick over highly weathered granitic rock. In some areas the surface layer is coarse sandy loam. The Chaix soil is moderately deep and formed in residuum derived from granitic rock. Typically, the surface layer is brown sandy loam about 7 inches thick. The subsoil is pale brown sandy loam about 19 inches thick over highly weathered granitic rock. In some areas the surface layer is coarse sandy loam. Rock outcrop occurs as isolated outcroppings and massive exposures of granitic rock. This unit is used mainly for timber production. It is also used as limited rangeland in summer. 91 Map Unit 622 624 Sirretta-Rock outcrop-Cannell complex, 5 to 30 percent slopes. This map unit is on mountainsides and ridges. The native plant communities are Yellow Pine Forest dominated by Jeffrey pine, White Fir Forest, and Montane Chaparral. Elevation is 6,990 to 8,790 feet. The average annual precipitation is about 20 to 39 inches. This unit is 30 percent Sirretta gravelly coarse sandy loam, 30 percent Rock outcrop, and 20 percent Cannell sandy loam. The components of this unit are so intricately intermingled that it was not practical to map them separately at the scale used. Sirretta Rock outcrop Cannell 20 to 40 in 40 to 60 in Very low Moderate 5 to 7 in lin 2 in Rapid Moderately rapid A B Excessively drained Well drained Medium to rapid Medium to rapid Moderate Moderate 0.17 0.20 GM/SW SM Intermediate Intermediate 4ePX 2ep 20 to 49 85 to 119 Poorly suited Poorly suited Regeneration difficulty—b, d, and e Summer Summer rock outcrop, plant competition IV IV Included in this unit are small areas of Nanny family soils, Dome soils, and Chaix soils. Included areas make up about 20 percent of the total acreage. The Sirretta soil is moderately deep and formed in residuum derived from granitic rock. This soil is 35 to 90 percent gravel and cobbles. Typically, the surface layer is dark grayish brown gravelly coarse sandy loam about 6 inches thick. The subsoil is brown and light yellowish brown gravelly loamy sand about 22 inches thick over fractured granitic rock. Rock outcrop occurs as isolated outcroppings and massive exposures of granitic rock. I The Cannell soil is deep and formed in residuum derived from granitic rock. Typically, the surface 1 layer is brown sandy loam 7 inches thick. The subsoil is yellowish brown sandy loam about 20 I inches thick. The substratum is yellowish brown sandy loam about 23 inches thick the surface layer III! is coarse sandy loam. ivfc:::*:::*: * This unit is used mainly for timber production. It is also used as rangeland in summer. Map Unit 624 92 625 Sirretta-Rock outcrop-Nanny family complex, 30 to 50 percent slopes. This map unit is on mountainsides and ridges. The native plant communities are Yellow Pine Forest dominated by Jeffrey pine, White Fir Forest, and Montane Chaparral. Elevation is 7,220 to 8,400 feet. The average annual precipitation is about 20 to 39 inches. This unit is 30 percent Sirretta gravelly coarse sandy loam, 30 percent Rock outcrop, and 20 percent Nanny family sandy loam. The components of this unit are so intricately intermingled that it was not practical to map them separately at the scale used. Sirretta Rock outcrop Nanny family 20 to 40 in 60+in Very low Moderate to low 1 to 2 in 4 to 6 in .5 in 2 in Rapid Moderately rapid A B Excessively drained Well drained Rapid Rapid Hi! Moderate Moderate 0.17 0.29 GM/SW SM/GM Intermediate Intermediate 4ePX 2e 20 to 49 50 to 84 Poorly suited Poorly suited Regeneration difficulty—b, d, and e Summer Summer liiil Rock outcrop, steep slopes, plant competition III III Illllllll Included in this unit are small areas of Cannell, Dome, and Chaix soils. Included areas make up about 20 percent of the total acreage. I The Sirretta soil is moderately deep and formed in residuum derived from granitic rock. This soil is 35 to 90 percent gravel and cobbles. Typically, the surface layer is dark grayish brown gravelly coarse sandy loam about 6 inches thick. The subsoil is brown and light yellowish brown gravelly loamy sand about 22 inches thick over fractured granitic rock. Rock outcrop occurs as isolated outcroppings and massive exposures of granitic rock. The Nanny family soil is deep and formed in residuum derived from granitic rock. This soil is 35 to 80 percent gravel and cobbles. Typically, the surface layer is very dark grayish brown sandy loam about 6 inches thick. The subsoil is brown and pale brown sandy loam and extremely gravelly fine sandy loam about 23 inches thick. The substratum is yellowish brown loamy fine sand and very gravelly loamy fine sand about 46 inches thick over highly weathered granitic rock. This unit is used mainly for timber production. It is also used as limited rangeland in summer. 93 Map Unit 625 628 Nanny family-Toem complex, 30 to 50 percent slopes. This map unit is on mountainsides and ridges. The native plant communities are Red Fir Forest, White Fir Forest, and Lodgepole Pine Forest. Elevation is 8,010 to 8,760 feet. The average annual precipitation is about 14 to 20 inches. This unit is 65 percent Nanny family sandy loam and 25 percent Toem loamy sand. The components of this unit are so intricately intermingled that is was not practical to map them separately at the scale used. Nanny family Toem 60+in 4 to 20 in Moderate to low Very low 4 to 6 in 1 to 2 in 2 in 2 in Moderately rapid Rapid B D Well drained Excessively drained Slow Very rapid High 0.32 SM Intermediate Intermediate 3Ep 3Ed 20 to 49 Poorly suited || Regeneration difficulty—a, b, d, and e, high erosion hazard Summer Summer mmmmmmmmm $iQQep sslopesjOpes>, shalloshalloww soilssoils,, planplantt competitiocompetitionn III III Included in this unit are small areas of Rock outcrop. Included areas make up about 10 percent of the The Nanny family soil is deep and formed in residuum derived from granitic rock. This soil is 35 to 80 percent gravel and cobbles. Typically, the surface layer is very dark grayish brown sandy loam about 6 inches thick. The subsoil is brown and pale brown sandy loam and extremely gravelly fine sandy loam about 23 inches thick. The substratum is yellowish brown loamy fine sand and very gravelly loamy fine sand about 46 inches thick over highly weathered granitic rock. The Toem soil is shallow and formed in residuum derived from granitic rock. Typically, the surface layer is dark grayish brown loamy sand about 3 inches thick. The substratum is brown loamy sand about 16 inches thick over highly weathered granitic rock. This unit is used mainly for timber production. It is also used as limited rangeland in summer. Map Unit 628 94 631 Chesaw family-Toem-Rock outcrop complex, 30 to 50 percent slopes. 1 This map unit is on mountainsides and ridges. The native plant communities are Sagebrush Scrub, I Foxtail-Limber Pine Forest, Red Fir Forest, Lodgepole Pine Forest, and Montane Chaparral. 1 Elevation is 7,780 to 9,190 feet. The average annual precipitation is about 12 to 18 inches. I This unit is 50 percent Chesaw family extremely cobbly loamy coarse sand, 30 percent Toem loamy I sand, and 10 percent Rock outcrop. The components of this unit are so intricately intermingled that it was not practical to map them separately at the scale used. Chesaw family Toem Rock outcrop lill 20 to 30 in 4 to 20 in Very low Very low 1 to 2 in 1 to 2 in lin 2 in Rapid Rapid A D lil Excessively drained Excessively drained Slow Very rapid High High 0.17 0.32 SM/GM-GP SM Sill Intermediate Intermediate 4EPX 3Ed :^:::::-:-::::^:::::::::::::^*:-:::-:-:;:-::<-::»v:-:x----:::-:-:--:-x--;x: 20-49 20-49 Poorly suited Poorly suited :<-:^:<-^^^<^^<<^-^^^:^-: II Summer Summer ||||||||||||:|||^ Shallow soils, steep slopes, plant competition IV IV Included in this unit are small areas of Nanny family soils and Cagwin soils. Included areas make up about 10 percent of the total acreage. The Chesaw family soil is moderately deep and formed in residuum derived from granitic rock.