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‘ Two Very Different Glacial Tills in the Northeast of Ireland’ Padraic Mulroy Environmental Pedology
 
Glaciation – 1. Midlandian 10,000-70,000bp 2. Munsterian 100,000- 125,000bp
SITE 2 SITE 1 SITE 1 SITE 1 SITE 1 SITE 2 SITE 1
 
Regional Climate <ul><li>Mean Annual Temperature -8.8°C (48°F)  </li></ul><ul><li>Mean Annual Soil Temperature - 9.7°C (49...
Soil 1. Podzolic Gley Variant
 
SITE
TP1
TP1 TP1 TP1
SLOPE TP1 TP2 TP3
Natural vegetation <ul><li>Grass – pastureland for beef cattle on  raised areas, intensive shallow drainage network  </li>...
TP1 TP2 TP3 Facing East
OCHRIC CAMBIC Ap horizon -  0 – 0.42m  Texture -  clay loam to clay  Color – 10 YR 5/4 Boundary -  smooth wavy Structure –...
TP2 2Bhb horizon – 1.9 – 2.85m Texture – peaty silt  Color – 10YR 4/2 Boundary - Gradual Structure – blocky to massive 2C1...
Soil Properties <ul><li>Infiltration – Low </li></ul><ul><li>Available water - Moderate </li></ul><ul><li>Hydraulic Conduc...
Soil Characteristics <ul><li>Infiltration – Footslope </li></ul><ul><li>Parent Material – Sandstone & shale </li></ul><ul>...
Diagnostic Horizons <ul><li>Epipedon -  Ochric   </li></ul><ul><li>Subsurface Horizon - Cambic </li></ul><ul><li>=> INCEPT...
Soil 2. Brown Earth
 
 
TP1 TP1
TP1
Natural vegetation <ul><li>Grass pastureland  </li></ul><ul><li>for beef cattle </li></ul><ul><li>Tillage –  </li></ul><ul...
TP1 Facing Southeast
TP1 Ap horizon -  0 – 0.2m  Texture -  gravelly channery loam  Color – 10 YR 3/2 Boundary -  v. diffuse irregular Structur...
Angular greywacke sandstone Subangular red sandstone Angular channers (shale) Subrounded pebble (granite) Glacial till dep...
Soil Properties <ul><li>Infiltration – High </li></ul><ul><li>Available water - Low </li></ul><ul><li>Hydraulic Conductivi...
Soil Characteristics <ul><li>Infiltration – Upland (near apex of hill) </li></ul><ul><li>Parent Material – Sandstone & sha...
Diagnostic Horizons <ul><li>Epipedon -  Ochric   </li></ul><ul><li>Subsurface Horizon – Cambic </li></ul><ul><li>=> INCEPT...
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Two Very Different Glacial Tills in the Northeast of Ireland. 18.05.10

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This is a presentation given to a graduate level Environmental Soil Pedology class as part of my course work for my Doctorate. Soil 1 is \'Podzolic grey variant\' (glacial till) located in drumlin country in Lisdoona, County Monaghan. This soil horizon shows a buried peat horizon reslting from solifluction possibly during the ice age. The second soil, Soil 2 is a glacial till located in Kilcurry. The american soil classification system is used to log each trialpit.

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Transcript of "Two Very Different Glacial Tills in the Northeast of Ireland. 18.05.10"

  1. 1. ‘ Two Very Different Glacial Tills in the Northeast of Ireland’ Padraic Mulroy Environmental Pedology
  2. 3. Glaciation – 1. Midlandian 10,000-70,000bp 2. Munsterian 100,000- 125,000bp
  3. 4. SITE 2 SITE 1 SITE 1 SITE 1 SITE 1 SITE 2 SITE 1
  4. 6. Regional Climate <ul><li>Mean Annual Temperature -8.8°C (48°F) </li></ul><ul><li>Mean Annual Soil Temperature - 9.7°C (49.5°F) </li></ul><ul><li>Total Annual Rainfall - 928mm </li></ul><ul><li>Total Annual ET - 400mm </li></ul>
  5. 7. Soil 1. Podzolic Gley Variant
  6. 9. SITE
  7. 10. TP1
  8. 11. TP1 TP1 TP1
  9. 12. SLOPE TP1 TP2 TP3
  10. 13. Natural vegetation <ul><li>Grass – pastureland for beef cattle on raised areas, intensive shallow drainage network </li></ul><ul><li>Rushes – low lying waterlogged areas or ‘troughs’ or peaty areas </li></ul><ul><li>Hedgerows – Hawthorn, Blackthorn, ash </li></ul>
  11. 14. TP1 TP2 TP3 Facing East
  12. 15. OCHRIC CAMBIC Ap horizon - 0 – 0.42m Texture - clay loam to clay Color – 10 YR 5/4 Boundary - smooth wavy Structure – fine/medium crumb & granular structure E1 horizon – 0.42 – 0.95m Texture - gravelly gritty loam Color – 5 Y 7/3 -6/3 Boundary – smooth wavy Structure – subangular, blocky Orange mottling at bottom interface 2Oeb horizon – 1.75 – 1.90m Texture - organic Color – 10YR 2/1 to 4/2 Boundary - smooth Structure – Moderate to fine crumb Some twigs and roots visible Bsg1 horizon – 1.05 – 1.40m Texture - clay (silt lenses) Color – Gley 2 5/1 Boundary -smooth ( no colour change) Structure – almost massive Bg2 horizon – 1.40 – 1.75m Texture - clay Color – Gley 2 6/1 Boundary – abrupt wavy Structure – massive Some root fibres LAND DRAIN TP1 Eg2 horizon – 0.95 – 1.05m Texture - gravelly gritty loam Color – 10 YR 6/6 Boundary – diffuse wavy Structure – subangular, blocky
  13. 16. TP2 2Bhb horizon – 1.9 – 2.85m Texture – peaty silt Color – 10YR 4/2 Boundary - Gradual Structure – blocky to massive 2C1gb horizon – 2.85 – 3.4m Texture – clayey loam Color – Gley 2 7/2 Boundary - Gradual Structure – blocky to massive 2C2gb horizon – 3.4 – 4.05m Texture – silt Color – Gley 2 8/2 Boundary – abrupt/unclear – not sighted Structure – massive v. soft, melted butter, v. sticky, dilatant
  14. 17. Soil Properties <ul><li>Infiltration – Low </li></ul><ul><li>Available water - Moderate </li></ul><ul><li>Hydraulic Conductivity – Low </li></ul><ul><li>Soil Wetness Class – Class 5 (<25cm bgl) </li></ul>
  15. 18. Soil Characteristics <ul><li>Infiltration – Footslope </li></ul><ul><li>Parent Material – Sandstone & shale </li></ul><ul><li>Soil slope – Sloping 6.5% </li></ul><ul><li>Surface run-off – ponded </li></ul><ul><li>Erosion Potential – very low </li></ul>
  16. 19. Diagnostic Horizons <ul><li>Epipedon - Ochric </li></ul><ul><li>Subsurface Horizon - Cambic </li></ul><ul><li>=> INCEPTISOL </li></ul>
  17. 20. Soil 2. Brown Earth
  18. 23. TP1 TP1
  19. 24. TP1
  20. 25. Natural vegetation <ul><li>Grass pastureland </li></ul><ul><li>for beef cattle </li></ul><ul><li>Tillage – </li></ul><ul><li>barley, oats, etc </li></ul><ul><li>Broadleaved Hedgerows – </li></ul><ul><li>Oak, Ash, etc </li></ul>
  21. 26. TP1 Facing Southeast
  22. 27. TP1 Ap horizon - 0 – 0.2m Texture - gravelly channery loam Color – 10 YR 3/2 Boundary - v. diffuse irregular Structure – coarse crumb to subangular blocky Bw or A2 horizon – 0.2 – 0.33m Texture - channery loam Color – 7.5YR 5/6 Boundary - diffuse irregular Structure – subangular blocky C horizon – 0.33 – 1.55m Texture - sandy loam Color – 10YR 5/6 Boundary – diffuse irregular Structure – crumb/subangular blocky R horizon – 1.55 – 3.5m Texture – weathered sandstone
  23. 28. Angular greywacke sandstone Subangular red sandstone Angular channers (shale) Subrounded pebble (granite) Glacial till deposits Subrounded & subangular Channers (limestone)
  24. 29. Soil Properties <ul><li>Infiltration – High </li></ul><ul><li>Available water - Low </li></ul><ul><li>Hydraulic Conductivity – Moderate/High </li></ul><ul><li>Soil Wetness Class - Class 1 (>150cm bgl) </li></ul>
  25. 30. Soil Characteristics <ul><li>Infiltration – Upland (near apex of hill) </li></ul><ul><li>Parent Material – Sandstone & shale </li></ul><ul><li>Soil slope – Sloping 10.5% </li></ul><ul><li>Surface run-off – Medium </li></ul><ul><li>Erosion Potential – High </li></ul>
  26. 31. Diagnostic Horizons <ul><li>Epipedon - Ochric </li></ul><ul><li>Subsurface Horizon – Cambic </li></ul><ul><li>=> INCEPTISOL </li></ul>Diagnostic Horizons <ul><li>Epipedon - Ochric </li></ul><ul><li>Subsurface Horizon – Cambic </li></ul><ul><li>=> INCEPTISOL </li></ul>
  27. 32. Thank You
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