| Geologic formations | 19 |
| Geologic fracture | 17 |
| Geologic layers | 15 |
| Geologic period | 15 |
| Geologic period between Triassic and Cretaceous | 47 |
| Geologic periods | 16 |
| Geologic process of erosion | 27 |
| Geologic procession | 19 |
| Geologic slices of time | 23 |
| Geologic span | 13 |
| Geologic spans | 14 |
| Geologic stage | 14 |
| Geologic stretches | 18 |
| Geologic study | 14 |
| Geologic succession | 19 |
| Geologic suffix | 15 |
| Geologic time | 13 |
| Geologic time before life | 25 |
| Geologic time division | 22 |
| Geologic time division (Var.) | 29 |
| Geologic time divisions | 23 |
| Geologic time frame | 19 |
| Geologic time period | 20 |
| Geologic time periods | 21 |
| Geologic time span | 18 |
| Geologic time spans | 19 |
| Geologic time unit | 18 |
| Geologic times | 14 |
| Geologic timespan | 17 |
| Geologic timespans | 18 |
| Geologic-time division | 22 |
| Geologic-time measurement | 25 |
| Geological periods | 19 |
| Geological age | 14 |
| Geological areas | 16 |
| Geological cold spell | 21 |
| Geological concern | 18 |
| Geological deposit from a mineral spring | 40 |
| Geological depression | 21 |
| Geological division | 19 |
| Geological divisions | 20 |
| Geological duration | 19 |
| Geological epoch | 16 |
| Geological epoch when mastodons appeared | 40 |
| Geological epochs | 17 |
| Geological era | 14 |
| Geological extent | 17 |
| Geological faults | 17 |
| Geological feature | 18 |
| Geological feature on a Utah license plate | 42 |
| Geological flat-top | 19 |
| Geological flattop | 18 |
| Geological formation | 20 |
| Geological formations | 21 |
| Geological layer | 16 |
| Geological layer, as of coal | 28 |
| Geological layers | 17 |
| Geological ledge | 16 |
| Geological levels | 17 |
| Geological peak | 15 |
| Geological period | 17 |
| Geological period (Var.) | 24 |
| Geological period of time | 25 |
| Geological periods | 18 |
| Geological range | 16 |
| Geological ridge | 16 |
| Geological ridges | 17 |
| Geological sample | 17 |
| Geological seam, in Sedan | 25 |
| Geological shifter | 18 |
| Geological span | 15 |
| Geological stage | 16 |
| Geological stretch | 18 |
| Geological stretches | 20 |
| Geological time | 15 |
| Geological time division | 24 |
| Geological time division (Var.) | 31 |
| Geological time divisions | 25 |
| Geological time frame | 21 |
| Geological time period | 22 |
| Geological time period (Var.) | 29 |
| Geological time period that underwent a name change | 51 |
| Geological time periods | 23 |
| Geological time series | 22 |
| Geological time span | 20 |
| Geological time spans | 21 |
| Geological times | 16 |
| Geological timespan (Var.) | 26 |
| Geological wonder | 17 |
| Geologicial time period | 23 |
| Geologist | 9 |
| Geologist Arnold: 1807–84 | 32 |
| Geologist Harry Fielding ___ | 28 |
| Geologist in "Volcano" | 32 |
| Geologist's big break? | 26 |
| Geologist's collectible | 27 |
| Geologist's concern | 23 |
| Geologist's division | 24 |
| Geologist's entire collection? | 34 |
| Geologist's explanation? | 28 |