SEDIS - Thesaurus
clays  | |
|---|---|
| RT | engineering geology |
| clay mineralogy | |
| clay | |
| shale | |
| insulation materials | |
| bentonite deposits | |
| refractory materials | |
| ornamental materials | |
| flint clay | |
| fuller's earth | |
| kaolin | |
| quick clay | |
| residual clays | |
| kaolin deposits | |
| sensitive clays | |
| soft clays | |
| stiff clays | |
| vermiculite | |
| SN | As of 1981, use only when of economic value; use clay for material in engineering geology. Before 1981, search clays AND deposits. Commodity. See List C. |
| Clays Ferry Formation | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Paleozoic | |
| ...Ordovician | |
| ....Clays Ferry Formation | |
| RT | Kentucky |
| Indiana | |
| Ohio | |
| SN | Middle and Upper Ordovician. Added to Thesaurus in 1989. |
| claystone | |
|---|---|
| BT | sedimentary rocks |
| .clastic rocks | |
| ..claystone | |
| UF | clay stone |
| RT | clay |
| terrigenous materials | |
| mudstone | |
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