| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| is shale an igneous rock | 1.47 | 0.9 | 7095 | 98 |
| is clay shale an igneous rock | 1.82 | 0.4 | 568 | 45 |
| is shale a rock | 0.52 | 0.1 | 3885 | 80 |
| is shale igneous sedimentary or metamorphic | 1.58 | 0.9 | 9632 | 94 |
| shale is what kind of rock | 0.51 | 0.7 | 1848 | 72 |
| shale is what type of rock | 1.96 | 0.2 | 3356 | 44 |
| what type of rock is shale rock | 1.82 | 0.5 | 6729 | 97 |
| is shale a mineral or a rock | 0.44 | 0.9 | 2183 | 43 |
| what rock is shale | 1.47 | 0.7 | 8058 | 8 |
| is shale a chemical rock | 1.56 | 0.2 | 1668 | 93 |
| what type of rock is clay shale | 0.15 | 1 | 3108 | 35 |
| is clay an igneous rock | 0.04 | 0.6 | 2266 | 81 |
| is clay shale a sedimentary rock | 0.01 | 0.2 | 774 | 84 |
| clay minerals in shale | 0.32 | 0.4 | 3527 | 34 |
| what rock type is shale | 0.18 | 0.1 | 2391 | 93 |
| what kind of rock is a shale | 1.6 | 0.7 | 6024 | 46 |
| shale is which type of rock | 1.91 | 0.5 | 7355 | 54 |
