120 Classification of the Soils – Mariel Series

Classification of the Soils
 Mariel Series

Depth class: Very deep

Drainage class: Very poorly drained

Permeability: Moderate

Position on landscape: Bogs in mountain basins

Parent material: Organic material

Slope range: 0 to 3 percent

Elevation: 5,000 to 6,500 feet

Average annual precipitation: 50 to 70 inches

Average annual air temperature: 38 to 42 degrees F

Frost-free period: 10 to 50 days

Frequency of ponding: Frequent

 Taxonomic class: Euic Typic Cryohemists

 Typical Pedon

 Oe1—0 to 5 inches; black (10YR 2/1) mucky peat; about 100 percent unrubbed fibers, 40 percent rubbed; many very fine, fine, and medium roots; strongly acid (pH 5.5); gradual smooth boundary.

Oe2—5 to 15 inches; very dark brown (10YR 2/2) mucky peat; about 85 percent unrubbed fibers, 35 percent rubbed; many very fine and fine roots; strongly acid (pH 5.5); clear wavy boundary.

Oa—15 to 61 inches; dark brown (7.5YR 3/2) muck; about 50 percent unrubbed fibers, 15 percent rubbed; many very fine roots; very strongly acid (pH 5.0).

 Typical Pedon Location

 Map unit in which located: Mariel-Stirfry complex, 0 to 3 percent slopes

Location in park: Mainly in Sphagnum Bog and Annie Creek bottom; 569016 meters easting and 4745702 meters northing, UTM Zone 10T, NAD 27

 Range in Characteristics


Depth to bedrock—more than 60 inches

Hue—10YR or 7.5YR

Depth to sapric material—7 to 15 inches

Depth of ponding—6 to 8 inches above the surface in January through June

Depth to water table—3 to 6 inches below the surface in July through December and at the surface in January through June

Oe horizon:

Value—2 or 3 moist

Chroma—1 or 2 moist

Texture—hemic material that is 80 to 100 percent unrubbed fibric material, 25 to 40 percent rubbed

Oa horizon:

Value—2 to 4 moist

Chroma—1 or 2 moist

Texture—sapric material that is 30 to 50 percent unrubbed material, 5 to 15 percent rubbed


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