The chemical inertness of a geologic material depends upon the inertness of the minerals of which it is composed. If the inertness of the individual minerals and the percentages of those minerals are known, an "inertness value" (IV) for the material as a whole may be calculated.
If you wish to review the Mineral Inertness 'rollover', click on the blue button.
To determine Inertness Values for the NYC rocks and sediments, follow these steps (see example):
WHAT YOU NEED TO DO:
|1. Click on the pink button and print out one copy of the 'Inertness Value Calculation Table', (printout # Q-4).||
|2. Determine the Inertness Value of each of the eight NYC geologic materials: diabase, gneiss, marble, sandstone, shale, schist, Long Island Hill Sediment, Long Island Plain Sediment.|
|3. Click on the 'Inertness Value Checking Table' button to see if your Inertness Values are correct.|
|4. Record all eight Inertness Values in column (b) of the Erosion-Resistance Index Calculation Table (printout #Q-6).|
David J. Leveson