ANDOSOLS OF EUROPE
Soil Resources of European Volcanic Systems

AZORES SOIL PROFILES

PROFILE N6- PAZ
Pico island, Azores - may 1999

Date of description: 01-05-1999

Authors: A.G. Jongmans, and F. van   Oort 

Location
:
Pico island, Azores


Altitude:
 400 m

Coordinates:  

Map number and Coordinates: 

Classification:   Hydrodand

Click on image to enlarge

 

Soil Climate: Mesic temperature regime, Udic moisture regime.
Topography: Hilly
Landform: Volcano
Land element: Slope,
Position: Middle slope
Slope: Located on a sloping (5-10%) slope; main slope is moderately steep
Form: Straight slope.
Landuse/Vegetation: Forest, Cryptomeria japonica, Pittosporum undulatum, Erica agorica, Rubus, Fern
Human influences: Profile is situated in a road cut, renewed 
for 1 m.
Parent material: Basaltic pyroclastic material.
Effective soil depth: Deep
Erosion: No erosion features visible.
Drainage class: Moderately well drained.
Moisture conditions: Moist

N6 - PAZ.SOIL  DESCRIPTION:

A1: 0-35/40 cm; 5YR 3/2; clay loam; strong very fine granular in clustered distribution pattern, and strong fine and medium subangular blocky structure; very friable; common very fine and fine pores; few to common fine to medium roots; charcoal fragments; clear and smooth to:
AB : 34/40-40/50 cm; 7.5YR3/4; clay loam; few fine subrounded totally altered gravel; pockets of strong very fine granular structure; strong fine and medium angular and subangular blocky structure; very friable; few to common very fine and fine pores; few fine and medium roots; dead roots, partially decomposed are present; clear and smooth to:
2AB 40/50-60/70 cm; 7.5YR 3/2; clay loam; few partially and totally weathered subrounded gravel, 2.5YR3/4 ,thixotropic; dominantly moderate fine (sub)angular blocky structure, in channels strong very fine granular structure; common very fine and fine pores; few fine roots, partially decomposed; gradual and smooth to:
2Bw1  60/70-95/100 cm; 10YR3/3; clay loam; few totally weathered gravel, 2.5YR3/4; very weak coarse prismatic structure, subdivided into strong very fine angular blocky structure; in channels locally strong fine granular structure; friable; common very fine and fine pores; few fine and medium roots; few dead roots; gradual and smooth to:
2Bw2 95/90-125 cm; 7.5YR3/4; clay loam; common fine medium and coarse totally and partially weathered gravel,in vesicles in the fragments yellowish/white allophane coatings; moderately fine angular blocky structure; friable; many fine and very fine pores; very few fine roots; dead roots present; clear and smooth to:
2Bw3  125-140 cm; 5YR4/4; clay loam; many fine to medium and coarse subrounded fresh ,partially and totally weathered gravel; common very fine and fine pores; few fine roots; dead roots present; abrupt and smooth to:
3C  >140 cm; 2.5YR3/2; alteration of bands of fine gravel and gravely clay loam; bands are thixotropic; yellowish fine textured coatings.

Last modified 13 May 2002 by EG