Crossword clues for Petroleum source 5 letters
| Answer | Clue |
|---|---|
| SHALE | Petroleum source |
| SHALE | Rock source of petroleum |
| SHALE | Possible source of petroleum |
| OILFIELDS | Petroleum sources |
| OILDEPOSIT | Underground petroleum source |
| Answer | Clue |
|---|---|
| SHALE | Petroleum source |
| SHALE | Rock source of petroleum |
| SHALE | Possible source of petroleum |
| OILFIELDS | Petroleum sources |
| OILDEPOSIT | Underground petroleum source |