IDENTIFIERS

Current Taxon Name (Soil Name): Tlozhavun

User Site ID: S2012AK290002

User Pedon ID: S2012AK290002

Vegetation Plot ID: S2012AK290002

User Site Association ID: AK685_3209_TLOZHAVUN_ALLAK685_3209_TLOZHAVUN_MODALAK685_TERRACES_LOESS_COLO_ALLAK685_F232XY221AK_RPCmodalAK685_ALL_TYPICAL_PEDONSAK685_HZNDATA_GROUP1AK685_HZNDATA_GROUP8

Lab Information:

Certified Lab Pedon Description - yes

Lab Source ID - SSL

Lab Pedon # - 13N19001

NCSS Pedon Lab Data NASIS Record ID - 73149

Print Date: 11/25/2024

LOCATION

Location In Web Soil Survey

AOI is roughly a square mile and pedon is marked in the center.

Location in SoilWeb

Location in Google Maps

Std. Latitude: 66.4638663

Std. Longitude: -145.6781619

Datum: WGS84

Township: 19N

Range: 10E

Section: 19

PLSS Details: NE1/4

Location Description: This site is located approximately 320ft west and 630ft south of the northeast corner of Section 19, T.19N, R.10E; Fairbanks, Meridian.

State: Alaska

County: AK290—Yukon-Koyukuk Census Area

MLRA: 232—Yukon Flats Lowlands

Non-MLRA Soil Survey Area: AK685—Yukon Flats Area, Alaska

7.5 Minute USGS Quad: 66145-C5—Fort Yukon B-4, Alaska

PEDON

Describers Name: Nathan Roth, Shawn Nield, Blaine Spellman, Jason Bladow

Current Taxonomic Class: Coarse-silty, mixed, superactive, nonacid Typic Haplocryepts

Current Taxon Kind: series

Pedon Type: representative pedon for component

Pedon Purpose: laboratory sampling site

Correlated Information:

Soil Name - Tlozhavun

PSC - 28 to 103 cm.

Classificaton Date - 12/8/2017

Classifier - J Paul

Soil Taxonomic Edition - twelfth edition

Moisture Class - udic

Moisture Subclass - typic

Sampled As Information:

Soil Name - Terrace - Boreal Forest HCPC Frozen

Taxonomic Class - Coarse-loamy, mixed, superactive, calcareous, subgelic Typic Haplorthels

Taxon Kind - taxon above family

Classificaton Date - 10/26/2012

Classifier - N Roth

Soil Taxonomic Edition - eleventh edition

Moisture Class - udic

Moisture SUBClass - typic

Dynamic Soil Properties:

Erosion Class - 1

Pedoderm Loose Cover Indicator - no

Hydric: no

Field Measured Properties: 5 cm of Charcoal

SITE

Parent Material: fibric organic material over coarse-loamy alluvium

Landscape: river valley

Landform: terrace

Geomorphic Component Terraces: tread

Slope Complexity: simple

Slope Shape Across: linear

Slope Shape Down: linear

Runoff: negligible

Drainage Class: well

Flooding: none flooding

Ponding: none ponding

Surface Fragments:

Benchmark Soil?: no

VEGETATION

Vegplot Text Note(s): AK SITE Access Database

SITE OBSERVATION

Observation Date: 7/29/2012 (actual site observation date)

Surface Cover Properties:

Site Obs. Cover Kind 1 - tree cover

Site Obs. Cover Kind 2 - conifers

Pedoderm Loose Cover Indicator - no

Drained? - no

Bedded Soil? - no

Forest Plantation? - no

Vegetation Plot Plants
Plant Symbol	Scientific Name	National Vernacular Name	Plant Type Group	Canopy Cover %	Vegetation Stata Level
2MOSS CAPU CAREX CLBO9 CLRA60 CLST60 CNCN HYSP70 MEPA PEAP60 PIGL PIGL PIGL POTR5 POTR5 PTCI PUPA5 SAGL SHCA SOMU ZIEL2	— Calamagrostis purpurascens Carex Cladonia botrytes Cladina rangiferina Cladina stellaris Cnidium cnidiifolium Hylocomium splendens Mertensia paniculata Peltigera aphthosa Picea glauca Picea glauca Picea glauca Populus tremuloides Populus tremuloides Ptilidium ciliare Pulsatilla patens Salix glauca Shepherdia canadensis Solidago multiradiata Zigadenus elegans	Moss purple reedgrass sedge cup lichen greygreen reindeer lichen star reindeer lichen Jakutsk snowparsley splendid feather moss tall bluebells felt lichen white spruce white spruce white spruce quaking aspen quaking aspen — eastern pasqueflower grayleaf willow russet buffaloberry Rocky Mountain goldenrod mountain deathcamas	— — — — — — — — — — — — — — — — — — — — —	5 5 — 5 5 5 — 40 3 5 5 15 1 1 — 20 — 3 3 — —	— — — — — — — — — — — — — — — — — — — — —

Pedon Restrictions
Kind	Hardness	Restriction Depth L-H	Restriction Thickness L-RV-H
		cm
permafrost	noncoherent	135 - 200	—

Pedon Diagnostic Features
Feature Kind	Feature Depth L-H	Feature Thickness L-RV-H
	cm
ochric epipedon cambic horizon gelic materials permafrost	0—17 17—42 91—135 135—175	—- —- —- —-

Setting and Climate
Slope	Slope Length USLE	Upslope Length	Elev.	Corr. Elev	Aspect	MAP	REAP	FFD	MAAT	MSAT	MWAT	MAST	MSST	MWST	MFFP	PE Index	Climate Station ID	Climate Station Name	Climate Station Type
%	m				degrees	mm	mm		C						mm
1	—	—	129	—	270	—	—	—	—	—	—	—	—	—	—	—	—	—	—

Oi—0 to 3 centimeters (0.0 to 1.2 inches); very dark brown (10YR 2/2) slightly decomposed plant material; low excavation difficulty; 2.0 coarse roots throughout; fragments; noneffervescent, by hcl, 1n; clear smooth boundary. Lab sample # 13N03728; moderately dry when described; observed in pit, small

A—3 to 17 centimeters (1.2 to 6.7 inches); dark yellowish brown (10YR 3/4) silt loam; moderate fine granular structure; very friable, slightly sticky, nonplastic; low excavation difficulty; 3.0 medium roots throughout and 2.0 coarse roots throughout; fragments; noneffervescent, by hcl, 1n; clear smooth boundary. Lab sample # 13N03729; moderately dry when described; observed in pit, small. This horizon has a slightly reddish tint to overall brown color that may have been cause from heat and oxidization from a fire history here.

Bw1—17 to 42 centimeters (6.7 to 16.5 inches); 80 percent dark yellowish brown (10YR 4/4) and 20 percent olive brown (2.5Y 4/3) silt loam; moderate medium subangular blocky structure; very friable, slightly sticky, nonplastic; low excavation difficulty; 3.0 medium roots throughout and 8.0 fine roots throughout and 1.0 coarse roots throughout; fragments; noneffervescent, by hcl, 1n; clear smooth boundary. Lab sample # 13N03730; moderately dry when described; observed in pit, small

Bw2—42 to 60 centimeters (16.5 to 23.6 inches); grayish brown (2.5Y 5/2) silt loam; weak fine platy structure; very friable, slightly sticky, nonplastic; low excavation difficulty; 5.0 medium roots throughout and 5.0 fine roots throughout; fragments; violent effervescence, by hcl, 1n; diffuse wavy boundary. Lab sample # 13N03731; moderately dry when described; observed in pit, small. This horizon could have split on color, however, we choose not to for practicality in sampling and moving the material back to base camp. There is an 8cm band of 2.5y 4/2 material that has clear, smooth boundaries at top of the horizon. As well, this horizon may also be more aptly designated as a BC horizon vs. Bw2. There are possible very faint threadlike masses that react to HCl and may well be secondary carbonates.

C1—60 to 91 centimeters (23.6 to 35.8 inches); grayish brown (2.5Y 5/2) very fine sandy loam; structureless massive; loose, nonsticky, nonplastic; low excavation difficulty; 1.0 medium roots throughout and 2.0 fine roots throughout; fragments; violent effervescence, by hcl, 1n; diffuse wavy boundary. Lab sample # 13N03732; moderately dry when described; observed in pit, small. Texture seems to be mostly lfs but there are minor areas of lvfs and or co-si as well.

C2—91 to 135 centimeters (35.8 to 53.1 inches); dark grayish brown (2.5Y 4/2) silt loam; structureless massive; loose, nonsticky, nonplastic; low excavation difficulty; 3.0 fine roots throughout; fragments; strong effervescence, by hcl, 1n; clear smooth boundary. Lab sample # 13N03733; moderately dry when described; observed in pit, small. C2 has a bubble-like structure from cryogenic processes and the lower parts are still mildly frozen at this date.

Cf—135 to 175 centimeters (53.1 to 68.9 inches); dark grayish brown (2.5Y 4/2) permanently frozen silt loam; structureless massive; slightly sticky, nonplastic; high excavation difficulty; fragments; strong effervescence, by hcl, 1n. Lab sample # 13N03734; moist when described; observed in pit, small