| Really long times | 17 |
| Not just centuries | 18 |
| Nigh-infinite periods | 21 |
| Nearly forever | 14 |
| Near-infinite timespans | 23 |
| Mountains have developed over them | 34 |
| Mind-boggling times | 19 |
| Mind-boggling time spans | 24 |
| Mind-boggling ages | 18 |
| Millenniums, and more | 21 |
| Many many centuries | 19 |
| Major stretches | 15 |
| Loooong time | 12 |
| Long, long stretches | 20 |
| Long periods, geologically | 26 |
| Long geologic stretches | 23 |
| Lengthy units of time | 21 |
| L-o-n-g times | 13 |
| Infinity almost | 16 |
| Infinity | 8 |
| Indefinitely long time periods | 30 |
| Indefinitely long periods of time | 33 |
| Indefinite years | 16 |
| Indefinite time periods | 23 |
| Inconceivably long times | 24 |
| Inconceivable times | 19 |
| Incalculable amounts of time | 28 |
| Immense time spans | 18 |
| Immeasurable times | 18 |
| I-don't-know-how-long | 25 |
| Huge spans | 10 |
| How long it takes canyons to form | 33 |
| Great time spans | 16 |
| Gobs of time | 12 |
| Geology class periods [subscribe to the best indie xwords today at avxwords.com] | 80 |
| Geological time divisions | 25 |
| Geologic stretches | 18 |
| Geologic procession | 19 |
| Gazillions of years | 19 |
| Forever, so to speak | 20 |
| Forever, figuratively | 21 |
| Forever, basically | 18 |
| For-EV-er | 9 |
| Extremely long time periods | 27 |
| Extra-long durations | 20 |
| Eternities, almost | 18 |
| Epochs and epochs | 17 |
| Earth's age, perhaps | 24 |
| Cosmic times | 12 |
| Billion-year periods | 20 |
| Billion-year increments, in geology | 35 |
| Astronomical time periods | 25 |
| Astronomical figures | 20 |
| Archean and Proterozoic | 23 |
| An extremely long time | 22 |
| Ages that boggle the mind | 25 |
| Ages of long duration | 21 |
| Ages galore | 11 |
| Age after age | 13 |
| A lot of time | 13 |
| A lot of the time? | 18 |
| A considerable spell | 20 |
| Volkswagen model | 16 |
| Canon camera model | 18 |
| Canon camera | 12 |
| Aurora's counterpart | 24 |
| Aurora's Greek counterpart | 30 |
| Sister of Helios | 16 |
| Mare's morsel | 17 |
| Goddess of dawn | 15 |
| Winged goddess | 14 |
| Daughter of Hyperion | 20 |
| VW model | 8 |
| Sister of Selene | 16 |
| Rosy-fingered goddess | 21 |
| Orion's beloved | 19 |
| Female deity | 12 |
| Selene's sister | 19 |
| Hyperion's daughter | 23 |
| Greek goddess of dawn | 21 |
| Greek dawn goddess | 18 |
| Aurora, to the Greeks | 21 |
| Morning person of Greek legend | 30 |
| Lover of Orion | 14 |
| Greek goddess of the dawn | 25 |
| Greek dawn deity | 16 |
| Goddess of the morning | 22 |
| Daybreak deity | 14 |
| Canon shooter | 13 |
| Canon camera line | 17 |
| "Rosy-fingered" goddess | 33 |
| Sunrise goddess | 15 |
| Sister of Helios and Selene | 27 |
| Mother of Zephyrus | 18 |
| Memnon's mother | 19 |
| Greek Aurora | 12 |
| Dawn personified | 16 |
| Canon camera named for a goddess | 32 |
| Canon camera brand | 18 |
| Aurora, to Aristotle | 20 |