| Similarity | Rank | |
|---|---|---|
| Cretaceous | 0.850 | 59402 |
| Devonian | 0.835 | 99765 |
| Triassic | 0.834 | 93483 |
| Shale | 0.807 | 29866 |
| Pleistocene | 0.775 | 71860 |
| Bakken | 0.765 | 53247 |
| shales | 0.755 | 97010 |
| Marcellus | 0.738 | 34448 |
| shale | 0.721 | 17984 |
| Cambrian | 0.712 | 62691 |
| Anadarko | 0.702 | 97984 |
| Holocene | 0.688 | 86928 |
| geologic | 0.681 | 35099 |
| sedimentary | 0.680 | 47805 |
| Utica | 0.670 | 47346 |
| Basin | 0.665 | 13536 |
| Panhandle | 0.642 | 48803 |
| Pilbara | 0.639 | 94612 |
| Jurassic | 0.637 | 32117 |
| Fossils | 0.636 | 91035 |
| Williston | 0.630 | 70809 |
| geological | 0.630 | 19326 |
| Sandstone | 0.628 | 72094 |
| Formation | 0.628 | 26921 |
| oilfields | 0.627 | 98378 |