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In July 2009, Dr. Paul Sanborn undertook the first soils field research at the Fort Selkirk volcanic field in central Yukon, with helicopter support and funding from the Yukon Geological Survey. This file includes digital photographs of the 2009 field work at the Ft. Selkirk site. Some of the digital photographs have been annotated as PDFs.

• Ft Selkirk 110114069.xls [particle size analysis data, CANTEST]
• S1090final.xlsx [chemical analysis data, Ministry of Forests & Range, Analytical Chemistry Laboratory]
• S1112final.xlsx [chemical analysis data, Ministry of Forests & Range, Analytical Chemistry Laboratory]
• Ft Selkirk 2009 soils data (updated Sept 15, 2010 and April 10, 2023).xls [consolidated lab data for all 2009 samples]

Slide roll contains the following photographs:

Y03-06
Date: August 10, 2003
Location Coordinates: 61° 4’ 1.5” N, 138° 21’ 57.4” W, 825.3 m asl (± 9.5 m)
Site Description: top of slope, E aspect
Sample Depths & Descriptions:

• Y03-06-01 - Crust
• Y03-06-02 - 0-6 cm - Ahk (10YR 3/2 m; strongly effervescent)
• Y03-06-03 - 6-14 cm - Bmk (2.5Y 3/3 m; strongly effervescent)
• Y03-06-04 - 14 cm+ - IICk (strongly effervescent)
  Slide roll 3 #36-35 (corresponding prints and negatives: Print roll 4, #1-2)

Y03-07 (peninsula near Kluane visitor centre, Sheep Mt.)
Date: August 11, 2003
Location Coordinates: 61° 1’ 42.8” N, 138° 29’ 36.2” W, 786.7 m asl (± 5.7 m)
Site Description:

• recent (?) landslide with loess accumulation in pockets, thinner on boulder surfaces, dominated by dark cyanobacteria crusts
• limited loess accumulation due to exposure of site
• crust is calcareous at surface
  Sample Depths & Descriptions:
• Y03-07-01 - Crust
• Y03-07-02 - 0-6 cm - Ck
• Y03-07-03 - 6-9 cm - Ahkb
• Y03-07-03 - 9 cm+ - Rock
  Slide roll 3 #34-30 (corresponding prints and negatives: Print roll 4, #3-10)

Lower Slims River (lookout knoll at parking lot N of visitor centre)
Date: August 11, 2003
Location Coordinates: 60° 59’ 56.4” N, 138° 33’ 36.4” W, 844.8 m asl (± 7.3 m)
Site Description: some fire disturbance, but lower slopes have more intact crusts on loess (calcareous to surface)
Slide roll 3 #29-26 (corresponding prints and negatives: Print roll 4, #11-17)

Lower Slims R (lowest bench below lookout knoll)
Date: August 11, 2003
Location Coordinates: 60° 59’ 51.8” N, 138° 33’ 36.2” W, 814.3 m asl (± 7.9 m)
Site Description: not burned; good intact crust; vegetation: A. frigida, Calamogrostis purpurea, Erigeron caespitosus, Linnaea, Carex filifolia (sparse cover ~ 50%)
Slide roll 3, #25-23 (corresponding prints and negatives: Print roll 4, #18-20)

Slims Soil
(Holocene paleosol with well-developed B horizon under Neoglacial calcareous loess – location not recorded, but likely from roadcut exposure along main Slims R trail)
Slides roll 3, #22 (corresponding prints and negatives: Print roll 4, #21)

Lower end of Sheep Creek
Date: August 11, 2003
Misc. views of grassland vegetation and landscape (locations not recorded)
Slides roll 3, #21-18 (corresponding prints and negatives: Print roll 4, #26-33)

Overlook at lower end of Sheep Creek canyon
Date: August 11, 2003
Location Coordinates: 60° 59’ 42.2” N, 138° 34’ 38.1” W, 878.0 m asl (± 9.5 m)
Site Description: heavy use by sheep (abundant droppings) but still has ~ 50% crust coverage
Slides roll 3, #17-16 (corresponding prints and negatives: Print roll 4, #34-35)

Slims River delta
Date: August 11, 2003
(location not recorded)
Slides roll 3, #15-14: salt efflorescences (corresponding prints and negatives: Print roll 5, #1-3)

Y03-08 (Cultus Bay Rd. – at top of switchbacks)
Date: August 12, 2003
Location Coordinates: 61° 3’ 43.1” N, 138° 21’ 4.0” W, 833.8 m asl (± 5.1 m)
Site Description: good exposure of loess (35 cm) with Slims Soil over glaciofluvial terrace – pinches out downslope [note: this site was sampled because of development of buried paleosol, and was not part of biological crust study by Marsh et al. (2006)]
Sample Depths & Descriptions:

• Y03-08-01 - 45-48 cm - Ahkb (7.5YR 3/3 d; strongly effervescent)
• Y03-08-02 - 48-56 cm - Bmkb (7.5YR 4/3 d; strongly effervescent)
• Y03-08-03 - 56-70 cm - Ccab (2.5Y 5/2 d; strongly effervescent)
• (not sampled) - 70 cm+ - IICca (glaciofluvial; strongly effervescent)
• Intact sample: 56-36 cm - depth (including Slims Soil)
  Slides roll 3, #13-11, 5-4 (corresponding prints and negatives: Print roll 5, #8-10, 17-18)

Y03-09 (cliff top on E. shore of Kluane L. at Christmas Bay)
Date: August 12, 2003
Location Coordinates: 61° 4’ 0.0” N, 138° 22’ 35.3” W, 828.3 m asl (± 7.3 m)
Site Description: ~ 60 cm loess over glaciofluvial gravels
Sample Depths & Descriptions:

• Y03-09-01 - Nostoc crust
• Y03-09-02 - Tortula ruralis – Cetraria crust
• Y03-09-03 - 0-14 cm - ACk (10YR 3\2 d)
• Y03-09-04 - 14-16 cm - Ahkb1 (10YR 2/2 d)
• Y03-09-05 - 16-18 cm - Ck1 (10YR 4/3 d)
• Y03-09-06 - 18-20 cm - Ahkb2 (10YR 3/2 d; discontinuous)
• Y03-09-07 - 20-27 cm - Bmkb1 (10YR 4/3 d)
• Y03-09-08 - 27-33 cm - Bmkb2 (7.5YR 4/3 d)
• Y03-09-09 - 33-46 cm - Bmkb3 (10YR 4/3 d)
• Y03-09-10 - 46-55 cm - Ck2 (2.5Y 5/3 d)
• (not sampled) - 55-60 cm+ - IICk (glaciofluvial gravels)
  Slide roll 3, #10-6 (corresponding prints and negatives: Print roll 5, #11-15)

Y03-10 (shore bluff N. of Silver City)
Date: August 12, 2003
Location Coordinates: 61° 2’ 55.0” N, 138° 23’ 17.2” W, 806.7 m asl (± 7.3 m)
Site Description: 70% slope, SW aspect; vegetation: Elymus, Carex, Artemisia, Erigeron
Sample Depths & Descriptions:

• Y03-10-01 - Crust
• Y03-10-02 - 0-18 cm - ACk (10YR 4/2 m; strongly effervescent)
• Y03-10-03 - 18-25 cm - Ahkb(?) (10YR 4/2 m; strongly effervescent)
• Y03-10-04 - 25-40 cm - Ck (2.5Y 5/2.5 m; strongly effervescent)
• (not sampled) - 40 cm+ - IICk (glaciofluvial gravels; strongly effervescent)
  Slide roll 3, #3-1 (corresponding prints and negatives: Print roll 5, #19-22)