List of holdings from the Neogene
| Epoch/Age | Formation | Location | # of Drawers |
|---|---|---|---|
| Pliocene | San Joaquin Formation | California | 1 |
| Pliocene | Jacalitos Formation | California | 1 |
| Pliocene | Etchegoin Group | California | 1 |
| Pliocene | Yorktown Formation | Maryland | 1 |
| Pliocene | Quillagua Formation | Chile | 1 |
| Pliocene | Carrillo Puento Formation | Mexico | 1 |
| Pliocene | Ebistima | 1 | |
| Pliocene | Scanchaken | 1 | |
| Miocene | Etchegoin Group | California | 1 |
| Miocene | Temblor Group | California | 1 |
| Miocene | Topanga Group | California | 1 |
| Miocene | Yorktown Formation | Maryland | 2 |
| Miocene | St. Mary's Formation | Maryland | 4 |
| Miocene | Duplin Marl | North/South Carolina | 1 |
| Miocene | Asamari | Iran | 1 |
| Miocene | Misc. | Israel | 1 |
| Miocene | Misc. | Italy | 1 |
| Miocene | Tomesaki Formation | Japan | 1 |