| Answer | Crossword Clue |
|---|---|
| EPOCH | A unit of geological time |
| EON | Geological time unit |
| darcy | a unit of geological permeability |
| darcys | DARCY, a unit of geological permeability |
| darcies | DARCY, a unit of geological permeability |
| ERAL | Of a geological time period |
| mesozoic | denoting a particular era of geological time |
| deglaciation | A period of geological time during which this takes place |
| deglaciations | A period of geological time during which this takes place |
| swarms | number of similar geological features or phenomena close together in space or time a swarm of dikes an earthquake swarm |
