Sites
| Site Identifier | Name | Location | Samples |
|---|---|---|---|
| 20GR | Smith mastodon | Gratiot County | 0 |
| 20GR-? | Smith mastodon | Gratiot County | 1 |
| 20GR176 | Gratiot County | 1 | |
| 20GR33 | Conversation Park | Gratiot County | 8 |
| 20GR91 | Holiday Park | Gratiot County | 4 |
| 20GR-VP | Thaller mastodon | Gratiot County | 1 |