| False, bedding | 32 |
| False, cleavage | 44 |
| Faults | 40 |
| Favosites | 40 |
| Felsites | 33 47 55 |
| Felspar, albite | 68 |
| Felspar, andesine | 67 68 70 |
| Felspar, anorthite | 14 30 68 |
| Felspar, anorthoclase | 61 |
| Felspar, bytownite | 14 |
| Felspar, cryptoperthic | 49 |
| Felspar, labradorite | 1 45 68 |
| Felspar, microcline | 27 36 |
| Felspar, oligoclase | 35 37 46 53 55 59 60 65 66 |
| Felspar, orthoclase | 1 11 34 35 36 37 38 42 47 51 53 55 59 65 66 |
| Felspar, plagioclase | 9 11 12 13 15 16 34 35 36 37 38 42 45 46 49 51 53 59 65 66 68 70 |
| Felspar, sanidine | 25 26 27 46 50 61 67 70 |
| Felspar, secondary | 29 39 |
| Ferric oxide | 36 |
| Ferrous carbonate | 63 64 |
| Ferruginous stains | 44 |
| Fichtelgebirge | 44 57 |
| File, engineer's | xx |
| Filtering paper | x |
| Finishing slides | xv |
| Firestone | 20 |
| Firth of Forth | 7 |
| Fissures of metamorphism | 41 42 |
| FITTON | 32 |
| Fixed air-bubbles | 50 |
| Flamborough Head | xxi |
| Flow-structure | 31 50 |
| Fluid inclosures | 47 |
| Foraminifera | 4 5 17 18 21 22 32 48 71 72 |
| Foraminiferal Marls | 22 |
| Fossil-remains | xxiii |
| Foundation cement | xvii |
| FOUQUE | 28 41 44 68 70 |
| Fracture, conchoidal | 31 |
| Fuchsin | 26 28 |
|