| Main Entry: | shale |
| Part of Speech: | noun |
| Definition: | rock |
Synonyms: |
clay, sediment, slate |
| Main Entry: | gravel |
| Part of Speech: | noun |
| Definition: | pebbles |
Synonyms: |
crushed rock, macadam, rocks, sand, screenings, shale, stones, tailings |
| Main Entry: | sedimentary rock |
| Part of Speech: | noun |
| Definition: | rock formed from sediment |
Synonyms: |
chalk, chemical sedimentary rock, clastic rock, conglomerate, limestone, lithified sediment, mechanical sedimentary rock, nonclastic rock, sandstone, shale, stratified rock |