| Answer | Crossword Clue |
|---|---|
| ICEAGE | When moraines were formed |
| ICEAGE | When the Great Lakes were formed |
| YLEM | The first substance from which the elements supposedly were formed. |
| paragenesis | A set of minerals that were formed together, esp. in a rock, or with a specified mineral |
| parageneses | A set of minerals that were formed together, esp. in a rock, or with a specified mineral |
