The Coastal Tundra at Barrow 



17 



FIGURE 1-7. Landscape map of the Tundra Biome research area. The 

 area mapped is the same as that in Figures 1-1 1 and 1-12. The black areas 

 are gravel roads and pads. The dashed lines indicate off-road vehicle 

 trails present in 1971. Heavy solid lines outline the major soil complexes, 

 associations, and units (Figure 1-11). The rectangle is commonly referred 

 to as site 4. Details of the hatched rectangle are shown in Figure 1-8. 



1) High-centered polygons, 

 relief >1 m. 



2) Mixed high-centered and low- 

 centered polygons, relief 4:0.5 

 m, frost boils common. 



3) High-centered polygons, 

 broad trough, relief <0. 5 m. 



4) Low-centered polygons, relief 

 <0.5 m. 



5) Large, low-centered 

 polygons, many orthogonal, 

 relief 4:0.5 m. 



6) Large, high-centered poly- 

 gons, narrow troughs, relief 0.1 

 to 0.5 m. 



7) Polygonal pattern, relief <0.1 

 m. 



8) Sloping areas (2 to 6%) mar- 

 ginal to streams, frost boils and 

 discontinuous polygonal cracks. 



9) Vegetation-covered water- 

 way, discontinuous polygonal 

 cracks. 



A) Alluvium. 



d) Disturbed area. 



