Indiana Administrative Code
Title 329 - SOLID WASTE MANAGEMENT DIVISION
Article 10 - SOLID WASTE LAND DISPOSAL FACILITIES
Rule 2 - Definitions
Section 2-206.3 - "Wentworth grain-size scale" defined

Universal Citation: 329 IN Admin Code 2-206.3
Current through September 18, 2024

Authority: IC 13-14-8-7; IC 13-15; IC 13-19-3

Affected: IC 13-11-2-17; IC 13-18; IC 25-31; IC 36-9-30

Sec. 206.3.

"Wentworth grain-size scale" means grain-size divisions defined by the following:

Grain Size Scales*
Grade Limits in Millimeters Grade Name
Lower Limit Upper Limit

256 and above Boulders
64 256 Cobbles
16 64 Coarse Pebbles
4 16 Fine
2 4 Granules
1 2 Very Coarse Sand
0.5 1 Coarse
0.25 0.5 Medium
0.125 0.25 Fine
0.062 0.125 Very Fine
0.031 0.062 Very Coarse Silt
0.016 0.031 Coarse
0.008 0.016 Medium
0.004 0.008 Fine
0.002 0.004 Very Fine
Below 0.002 0.002 Clay

*IDEM, Requirements for Describing Unconsolidated Deposits, revised November 19, 1988.

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