soil map units where Ugs Unaltered sands and gravels is dominant
                
            
        Soil properties
| Property | Value | 
|---|---|
| Geographic distribution | Tuvalu | 
| Landscape position | Bare areas of unaltered coral sands and gravels | 
| Soil parent material | Coralline sand and gravel | 
| Slope | Flat (0-3°) | 
| Surface outcrops | No surface outcrops | 
| Brief soil profile description | Bare areas of unaltered coral sands and gravels with no soil development | 
| Soil profile texture | n/a | 
| Minimum effective rooting depth | n/a | 
| Soil pH (acidity) | n/a | 
| Salinity | n/a | 
| Soil fertility under natural conditions | Not analysed | 
| Soil moisture regime | Ustic | 
| Susceptibility to drought | n/a | 
| Soil drainage | Excessively drained | 
| Susceptibility to waterlogging | n/a | 
| Susceptibility to flooding | n/a |