Environmental Engineering Reference
In-Depth Information
TABLE 2.1 Size Characteristics of Soil Separates Using Soil Science and Engineering
Definitions
Soil
component
Subdivision
Engineering
designation
Soil science
designation a
Cobbles/gravel 75/4.75
Coarse 4.75-2.00
Sand Medium 2.00-0.425 2.00-0.02
Small 0.425-0.075
Silt >0.075 0.02-0.002
Clay >0.002
a This is the international definition—the U.S. Department of
Agriculture definition is somewhat different.
Note: (All units are in mm.)
Source: Data from Refs. 15 and 18.
 
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