| Epoch |
| Epochs |
| Epoch that saw the dawn of modern mammals |
| Dawn of the mammals" epoch |
| Epoch when modern mammals arose |
| Frigid, molded dessert |
| Epoch when mammals began |
| Epoch in which mammals became dominant |
| Span of epoch proportions? |
| Frigid |
| Epoch when mammals appeared |
| Dawn horse epoch |
| Epochal segments |
| Epoch in which grazing mammals became widespread |
| Epochs unlimited |
| Frigid spell |
| Frigid-climate seabird |
| Obviously frigid |
| Deposits from a geological epoch |
| Epoch in which mammals arose |
| Frigid follower? |
| Epoch when modern mammals appeared |
| Frigid suffix? |
| Geological epoch in which mammals arose |
| Geological epochs |
| Imaginary boundary for the South Frigid Zone |
| Period of frigid temperatures |
| A Tertiary Period epoch |
| Epoch when modern mammals emerged |
| Frigidly |