Indiana Administrative Code (Last Updated: December 20, 2016) |
Title 329. SOLID WASTE MANAGEMENT DIVISION |
Article 329IAC10. SOLID WASTE LAND DISPOSAL FACILITIES |
Rule 329IAC10-2. Definitions |
Section 329IAC10-2-206.3. "Wentworth grain-size scale" defined
Latest version.
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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. (Solid Waste Management Division; 329 IAC 10-2-206.3; filed Aug 2, 1999, 11:50 a.m.: 22 IR 3770; errata filed Sep 8, 1999, 11:38 a.m.: 23 IR 27)